`aws ec2-instance-connect` times out too fast on MacOS

### Describe the bug

When I use the `ec2-instance-connect` command, the ssh connection disconnects after 5 second of inactivity.

### Expected Behavior

I expect it to wait for a longer idle time before disconnectcing.

### Current Behavior

The ssh connection times out after 5 seconds of inactivity.

### Reproduction Steps

```
$ aws ec2-instance-connect ssh --instance-id --connection-type eice
, #_
~\_ ####_ Amazon Linux 2023
~~ \_#####\
~~ \###|
~~ \#/ ___ https://aws.amazon.com/linux/amazon-linux-2023
~~ V~' '->
~~~ /
~~._. _/
_/ _/
_/m/'
Last login: Mon Jul 15 19:11:22 2024 from 10.0.2.10
[ec2-user@ip-10-80-195-10 ~]$ Timeout, server 10.80.195.10 not responding.
```

### Possible Solution

There's a configuration for the **ServerAliveInterval** in [ssh.py](https://github.com/aws/aws-cli/blob/3c6bd732b30fcce4223f69b6c2fb1249870c78b8/awscli/customizations/ec2instanceconnect/ssh.py#L326C20-L326C41) for 5 seconds.

My MacOS's **/etc/ssh/ssh_config** file contains the following configuration:

```
ServerAliveCountMax 0
ServerAliveInterval 900
```

The short **ServerAliveInternal** option from the AWS CLI doesn't work too well with MacOS's default `ServerAliveCountMax 0`.

Can we either remove it, or configure the `ServerAliveCountMax` alongside it?

### Additional Information/Context

_No response_

### CLI version used

aws-cli/2.17.13 Python/3.11.9 Darwin/23.5.0 exe/x86_64

### Environment details (OS name and version, etc.)

Sonoma 14.5 (Apple M3 Pro)