https://docs.github.com/en/actions/learn-github-actions/events-that-trigger-workflows

This commit will add a pytest fixture to configure the S3 bucket name.

A configurable S3 bucket name enables contributors to run tests on their
forks and in their AWS accounts, by setting a GitHub Secrets variable
`${{ secrets.TEST_AWS_S3_BUCKET_NAME }}`. Defaults to `aioaws-testing`.

The function is written with an if expression instead of with
`os.getenv('TEST_AWS_S3_BUCKET_NAME', 'aioaws-testing')` because of how
the environment variable value is passed in from GitHub Actions. If
`${{ secrets.TEST_AWS_S3_BUCKET_NAME }}` is not set, then the value of
the environment variable `TEST_AWS_S3_BUCKET_NAME` will be an empty
string, and `os.getenv('TEST_AWS_S3_BUCKET_NAME', 'aioaws-testing')`
will return an empty string.

As with the S3 bucket name, enabling configuration of the email address
allowscontributors to run tests on their forks and in their AWS accounts
by setting `${{ secrets.TEST_AWS_SES_ADDRESS }}` in GitHub Secrets.
Defaults to `testing@scolvin.com`.

This is a "resource-based policy" that allows an IAM role to be assumed.
https://docs.aws.amazon.com/IAM/latest/UserGuide/access_policies_identity-vs-resource.html

- Use aws-actions/configure-aws-credentials to obtain temporary security
  credentials
- Pass both the static and temporary credentials to pytest

Parametrize the pytest fixture so that it is generated for each item in
params, and each test that uses the fixture runs for each param
https://docs.pytest.org/en/latest/how-to/fixtures.html

Session tokens are used when AWS resources obtain temporary credentials.

- Add `aws_session_token: str` model fields
  - `aioaws._types.S3ConfigProtocol`
  - `aioaws.s3.S3Config`
- Add `aioaws.core.AwsClient.aws_session_token` attribute
- Update `aioaws.core.AwsClient._auth_headers` to add session token into
  signature
- For S3 downloads, add `X-Amz-Security-Token` param to
  `aioaws.core.AwsClient.add_signed_download_params`
- For S3 uploads, allow `X-Amz-Security-Token` as an extra condition in
  `aioaws.core.AwsClient.upload_extra_conditions`, then add to upload
  signature using `aioaws.core.AwsClient.signed_upload_fields`

#23 (comment)
#23 (comment)

#23 (comment)

#23 (comment)
#23 (comment)

This reverts commit 4f0142d.