**Apache Airflow version**: 1.10.8 (Patched with latest AWS Hook)

**Environment**:

- **Cloud provider or hardware configuration**: 4 VCPU 8GB RAM VM
- **OS** (e.g. from /etc/os-release): RHEL 7.7
- **Kernel** (e.g. `uname -a`): Linux 3.10.0-957.el7.x86_64
- **Install tools**:
- **Others**:
The AWS Hook functionality for AssumeRoleWithSAML is not available in this version, we manually added it via patching the hook file.

**What happened**:
We've been using this hook for a while now with this issue, basically sts.assume_role and sts.assume_role_with_saml will return temporary credentials that are only valid for eg 1 hour by default. Eventually with long running operators / hooks / sensors some of them fail because the credentials have expired.

Example error messages
An error occurred (ExpiredTokenException) when calling the AssumeRole operation: Response has expired
An error occurred (ExpiredTokenException) when calling the AssumeRoleWithSAML operation: Response has expired
botocore.exceptions.ClientError: An error occurred (ExpiredTokenException) when calling the <any operation here> operation: The security token included in the request is expired

**What you expected to happen**:

AWS hook should be updated to use boto3 RefreshableCredentials when temporary credentials are in use.

**How to reproduce it**:

Use any of the assume role methods with the AWS Hook, create a session, wait 1 hour (or whatever expiry period applies to your role), and try and use the hook again.

**Anything else we need to know**:

I have a solution, please self-assign this.
airflow/providers/amazon/aws/hooks/base_aws.py
self, role_arn: str, session: boto3.session.Session, session_kwargs: Dict[str, Any]
    ) -> boto3.session.Session:
        assume_role_kwargs = self.extra_config.get("assume_role_kwargs", {})
        assume_role_method = self.extra_config.get('assume_role_method')
        self.log.info("assume_role_method=%s", assume_role_method)
        if not assume_role_method or assume_role_method == 'assume_role':
            sts_client = session.client("sts", config=self.config)
            sts_response = self._assume_role(
                sts_client=sts_client, role_arn=role_arn, assume_role_kwargs=assume_role_kwargs
            )
        elif assume_role_method == 'assume_role_with_saml':
            sts_client = session.client("sts", config=self.config)
            sts_response = self._assume_role_with_saml(
                sts_client=sts_client, role_arn=role_arn, assume_role_kwargs=assume_role_kwargs
            )
        elif assume_role_method == 'assume_role_with_web_identity':
            botocore_session = self._assume_role_with_web_identity(
                role_arn=role_arn,
                assume_role_kwargs=assume_role_kwargs,
                base_session=session._session,