gomplate settings does not respect timeout parameter or env variables

### Describe the Bug

Despite that `gomplate` has timeout settings configured in `atmos.yaml` as `gomplate.timeout` or `env.AWS_TIMEOUT` - the framework does not seem to respect timeout setting and still uses the default AWS SDK Go timeout.

When I execute `atmos plan` for a component which uses `datasource` `gomplate`s function - plan fails with timeout error:
```
RequestError: send request failed
caused by: Get "https://portal.sso.us-east-1.amazonaws.com/federation/credentials?account_id=&role_name=": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
```
When I ran the same `atmos` command with env variable set by the shell - there is no timeout error, e.g `AWS_TIMEOUT="5000" atmos terraform plan -s `.

AWS SDK Go has a default timeout set at 500ms, which kind of explains the timeout error.

### Expected Behavior

When `templates.settings.gomplate.timeout` set to 5 (seconds) or `templates.settings.env.AWS_TIMEOUT` set to 5000 (ms) in `atmos.yaml` - gotemplate `datasource` function will respect the settings

### Steps to Reproduce

1. in `atmos.yaml` configure template settings:
```yaml
templates:
settings:
env:
AWS_TIMEOUT: "5000"
gomplate:
enabled: true
timeout: 10
datasources:
datasource-from-secret:
url: "aws+sm:"
```
2. Use `gomplate` `datasource` function in a component:
```
components/sns-topic:
metadata:
component: sns-topic
inherits:
- sns-topic/defaults
vars:
name: 'component'
...
endpoint: 'https://host.example/{{ (datasource "datasource-from-secret") }}/example'
...
```
3. run `atmos terraform plan component/sns-topic -s

### Screenshots

_No response_

### Environment

- atmos version 1.168.0
- Terraform version 1.9.8

### Additional Context

_No response_

Start by reproducing the gomplate datasource timeout with the `templates.settings.gomplate.timeout` and `templates.settings.env.AWS_TIMEOUT` values shown in the issue, then trace how those settings reach the AWS SDK Go request. Done means both configuration forms prevent the default timeout failure during `atmos terraform plan`; verify against the reported `atmos` and Terraform versions.

Written by the indexing model from the issue text.