Type annotations for boto3 CloudWatchObservabilityAccessManager

mypy-boto3-oam provides type annotations for the boto3 CloudWatchObservabilityAccessManager service, enabling static type checking and improved IDE support for AWS SDK for Python (boto3) users. It is generated with `mypy-boto3-builder 8.12.0` and currently stands at version 1.42.3, aligning with the versioning of `boto3` for which it provides stubs. The `mypy-boto3` project actively releases updates, often in sync with `boto3` and `botocore` releases, as well as `mypy-boto3-builder` updates.