Merge AWSCore automation tests to the development branch (#2011)

* Create AWS Core automation for the interacting with AWS resources via the AWS Core gem.
Signed-off-by: junbo <junbo@amazon.com>
Co-authored-by: clujames <clujames@amazon.com>

AutomatedTesting/Gem/PythonTests/AWS/conftest.py

@@ -6,6 +6,7 @@ SPDX-License-Identifier: Apache-2.0 OR MIT
 import pytest
 import logging
 from AWS.common.aws_utils import AwsUtils
+from AWS.common.aws_credentials import AwsCredentials
 from AWS.Windows.cdk.cdk_utils import Cdk
 
 logger = logging.getLogger(__name__)
@@ -81,3 +82,26 @@ def cdk(
     request.addfinalizer(teardown)
 
     return pytest.cdk_obj
+
+
+
+@pytest.fixture(scope='function')
+def aws_credentials(request: pytest.fixture, aws_utils: pytest.fixture, profile_name: str):
+    """
+    Fixture for setting up temporary AWS credentials from assume role.
+
+    :param request: _pytest.fixtures.SubRequest class that handles getting
+        a pytest fixture from a pytest function/fixture.
+    :param aws_utils: aws_utils fixture.
+    :param profile_name: Named AWS profile to store temporary credentials.
+    """
+    aws_credentials_obj = AwsCredentials(profile_name)
+    original_access_key, original_secret_access_key, original_token = aws_credentials_obj.get_aws_credentials()
+    aws_credentials_obj.set_aws_credentials_by_session(aws_utils.assume_session())
+
+    def teardown():
+        # Reset to the named profile using the original AWS credentials
+        aws_credentials_obj.set_aws_credentials(original_access_key, original_secret_access_key, original_token)
+    request.addfinalizer(teardown)
+
+    return aws_credentials_obj