credential behavior used by codedeploy-agent differed depending on Amazon Linux version

### Summary
The presence or absence of a IAM credential file on the instance where the CodeDeploy Agent is installed produces different results.

### Environment
**Common**
* CodeDeploy Agent : OFFICIAL_1.7.0-92_rpm

**AMI**
(There is no difference in the detailed version. It is the same even if you use the latest version.)
* AL2 : ami-01fccab91b456acc2 (al2023-ami-2023.5.20240708.0-kernel-6.1-x86_64)
* AL2023 : ami-0b72821e2f351e396 (amzn2-ami-kernel-5.10-hvm-2.0.20240709.1-x86_64-gp2)

**Steps**
1) install codedeploy-agent successfully with Instance Profile, Agent running successfully and Deployment success
2) stop agent
3) switch user(sudo su -) and set IAM credential with `aws configure` with dummy access info for `AccessDenied`)
4) start agent

### Result
**Amazon Linux 2**
Agent running successfully with Instance Profile without any Exceptions
~~~
2024-07-22T11:22:41 INFO [codedeploy-agent(3277)]: master 3277: Spawned child 1/1
2024-07-22T11:22:41 DEBUG [codedeploy-agent(3281)]: Registering Plugins: ["codedeploy"].
2024-07-22T11:22:41 DEBUG [codedeploy-agent(3281)]: Loading plugin codedeploy from /opt/codedeploy-agent/lib/instance_agent/plugins/codedeploy/register_plugin
2024-07-22T11:22:42 DEBUG [codedeploy-agent(3281)]: Registered Plugins: #.
2024-07-22T11:22:42 INFO [codedeploy-agent(3281)]: On Premises config file does not exist or not readable
2024-07-22T11:22:42 DEBUG [codedeploy-agent(3281)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Configuring deploy control client: Region="us-east-1"
2024-07-22T11:22:42 DEBUG [codedeploy-agent(3281)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Deploy control endpoint override=
2024-07-22T11:22:42 DEBUG [codedeploy-agent(3281)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Enable auth policy = false
2024-07-22T11:22:42 INFO [codedeploy-agent(3281)]: Creating client url from IMDS region and domain
2024-07-22T11:22:42 INFO [codedeploy-agent(3281)]: CodeDeploy endpoint: https://codedeploy-commands.us-east-1.amazonaws.com
2024-07-22T11:22:42 INFO [codedeploy-agent(3281)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandExecutor: Archives to retain is: 5}
2024-07-22T11:22:42 DEBUG [codedeploy-agent(3281)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Initializing Host Agent: Host Identifier = arn:aws:ec2:us-east-1:482009018293:instance/i-04b2a2497a9fe5409
2024-07-22T11:22:42 DEBUG [codedeploy-agent(3281)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Validating CodeDeploy Plugin Configuration
2024-07-22T11:22:42 INFO [codedeploy-agent(3281)]: Creating client url from IMDS region and domain
2024-07-22T11:22:42 INFO [codedeploy-agent(3281)]: CodeDeploy endpoint: https://codedeploy-commands.us-east-1.amazonaws.com
2024-07-22T11:22:42 INFO [codedeploy-agent(3281)]: Creating client url from IMDS region and domain
2024-07-22T11:22:42 INFO [codedeploy-agent(3281)]: CodeDeploy endpoint: https://codedeploy-commands.us-east-1.amazonaws.com
2024-07-22T11:22:42 DEBUG [codedeploy-agent(3281)]: Current deploy control endpoint: https://codedeploy-commands.us-east-1.amazonaws.com
2024-07-22T11:22:42 DEBUG [codedeploy-agent(3281)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: CodeDeploy Plugin Configuration is valid
2024-07-22T11:22:42 DEBUG [codedeploy-agent(3281)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Calling PollHostCommand:
2024-07-22T11:22:42 INFO [codedeploy-agent(3281)]: Version file found in /opt/codedeploy-agent/.version with agent version OFFICIAL_1.7.0-92_rpm.
2024-07-22T11:22:42 INFO [codedeploy-agent(3277)]: Started master 3277 with 1 children
2024-07-22T11:23:28 DEBUG [codedeploy-agent(3281)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: PollHostCommand: Host Command = nil
2024-07-22T11:23:29 DEBUG [codedeploy-agent(3281)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Calling PollHostCommand:
2024-07-22T11:23:29 INFO [codedeploy-agent(3281)]: Version file found in /opt/codedeploy-agent/.version with agent version OFFICIAL_1.7.0-92_rpm.
~~~

**Amazon Linux 2023**
Agent has `AccessDenied`
~~~
2024-07-22T10:52:57 INFO [codedeploy-agent(26949)]: master 26949: Spawned child 1/1
2024-07-22T10:52:57 DEBUG [codedeploy-agent(26951)]: Registering Plugins: ["codedeploy"].
2024-07-22T10:52:57 DEBUG [codedeploy-agent(26951)]: Loading plugin codedeploy from /opt/codedeploy-agent/lib/instance_agent/plugins/codedeploy/register_plugin
2024-07-22T10:52:58 DEBUG [codedeploy-agent(26951)]: Registered Plugins: #.
2024-07-22T10:52:58 INFO [codedeploy-agent(26951)]: On Premises config file does not exist or not readable
2024-07-22T10:52:58 DEBUG [codedeploy-agent(26951)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Configuring deploy control client: Region="us-east-1"
2024-07-22T10:52:58 DEBUG [codedeploy-agent(26951)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Deploy control endpoint override=
2024-07-22T10:52:58 DEBUG [codedeploy-agent(26951)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Enable auth policy = false
2024-07-22T10:52:58 INFO [codedeploy-agent(26951)]: Creating client url from IMDS region and domain
2024-07-22T10:52:58 INFO [codedeploy-agent(26951)]: CodeDeploy endpoint: https://codedeploy-commands.us-east-1.amazonaws.com
2024-07-22T10:52:58 INFO [codedeploy-agent(26951)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandExecutor: Archives to retain is: 5}
2024-07-22T10:52:58 DEBUG [codedeploy-agent(26951)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Initializing Host Agent: Host Identifier = arn:aws:ec2:us-east-1:482009018293:instance/i-03b839d4f08f2691a
2024-07-22T10:52:58 DEBUG [codedeploy-agent(26951)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Validating CodeDeploy Plugin Configuration
2024-07-22T10:52:58 INFO [codedeploy-agent(26951)]: Creating client url from IMDS region and domain
2024-07-22T10:52:58 INFO [codedeploy-agent(26951)]: CodeDeploy endpoint: https://codedeploy-commands.us-east-1.amazonaws.com
2024-07-22T10:52:58 INFO [codedeploy-agent(26951)]: Creating client url from IMDS region and domain
2024-07-22T10:52:58 INFO [codedeploy-agent(26951)]: CodeDeploy endpoint: https://codedeploy-commands.us-east-1.amazonaws.com
2024-07-22T10:52:58 DEBUG [codedeploy-agent(26951)]: Current deploy control endpoint: https://codedeploy-commands.us-east-1.amazonaws.com
2024-07-22T10:52:58 DEBUG [codedeploy-agent(26951)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: CodeDeploy Plugin Configuration is valid
2024-07-22T10:52:58 DEBUG [codedeploy-agent(26951)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Calling PollHostCommand:
2024-07-22T10:52:58 INFO [codedeploy-agent(26951)]: Version file found in /opt/codedeploy-agent/.version with agent version OFFICIAL_1.7.0-92_rpm.
2024-07-22T10:52:58 ERROR [codedeploy-agent(26951)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Error polling for host commands: Aws::CodeDeployCommand::Errors::AccessDeniedException - Aws::CodeDeployCommand::Errors::AccessDeniedException - /opt/codedeploy-agent/vendor/gems/aws-sdk-core-3.121.1/lib/seahorse/client/plugins/raise_response_errors.rb:17:in `call'
~~~

### Expectation
the way the agent accesses the credentials should be the same, regardless of the difference in the linux version.
According to the [document](https://docs.aws.amazon.com/sdk-for-ruby/v3/api/), `~/.aws/credentials` has a higher priority than the instance profile. Then, the `AccessDenied` that occurs in AL2023 is normal behavior, and the fact that no error occurs in AL2 is a malfunction that does not recognize the credentials file in AL2.

### Additional found
* AL2023 : ruby v3 -> sdk v3 `gem 'aws-sdk', '~> 3'` ([document](https://docs.aws.amazon.com/sdk-for-ruby/v3/api/))
* Amazon Linux 2 : ruby v2 -> sdk v2 `gem 'aws-sdk', '~> 2'` ([document](https://docs.aws.amazon.com/sdk-for-ruby/v2/api/))
* CodeDeploy Agent OFFICIAL_1.7.0-92_rpm : `spec.required_ruby_version = '>= 2.7.0'`, `spec.add_dependency('aws-sdk-core', '~> 3')` ([document](https://github.com/aws/aws-codedeploy-agent/blob/1.7.x/codedeploy_agent.gemspec))

### Reference
https://docs.aws.amazon.com/sdk-for-ruby/v3/api/
https://docs.aws.amazon.com/sdk-for-ruby/v2/api/

Beginnen Sie mit codedeploy_agent.gemspec und dem in den Logs gezeigten CommandPoller-Start- und -Polling-Pfad und vergleichen Sie anschließend die in diesem Issue referenzierte Dokumentation zur Credential-Auflösung des AWS SDK for Ruby v2 und v3. Als erledigt gilt die Aufgabe, wenn der Agent ~/.aws/credentials und das Instance Profile unter Amazon Linux 2 und Amazon Linux 2023 konsistent verarbeitet und das erwartete Berechtigungsergebnis liefert.

Vom Indexierungsmodell aus dem Issue-Text verfasst.