Add AWS CodeCommit git authentication support

[bdalpe]

Describe the current behavior

AWS CodeCommit is back from the dead returning to GA.

CodeCommit uses AWS SigV4 to inject a username and password into the URL to access the git repository via HTTPS.

Describe the proposed behavior

Modeling this after the other Git credential blocks, it would be trivial to implement the ability to clone the git repo. AWS git-remote-codecommit already has a usable model implementation: https://github.com/aws/git-remote-codecommit/blob/5ed175190c584bef20eceb84c1eb5aaafec22cf7/git_remote_codecommit/__init__.py#L188-L233

Example Use

In prefect.yaml, a user would be able to define this block for the credentials:

pull:
  - prefect.deployments.steps.git_clone:
      repository: https://git-codecommit.us-east-1.amazonaws.com/v1/repos/my-repo
      credentials: "{{ prefect.blocks.aws-codecommit-credentials.my-codecommit-credentials-block }}"

Additional context

No response