Feat: add aws/ecrpublic module

[matiri132]

Description

This is the code for the issue: #1288
It creates the AWS ECR-Public module to interact with ECR public repositories.
Backward compatibility is maintained. The test temporarily creates a ECR public repository

Test outputs: https://gist.github.com/matiri132/e079eb89a61028ee89d244b991bc19bd

TODOs

• Update the docs.
• Run the relevant tests successfully, including pre-commit checks.
• Ensure any 3rd party code adheres with our license policy or delete this line if its not applicable.
• Include release notes. If this PR is backward incompatible, include a migration guide.

Release Notes (draft)

Added ecrpublc module to support interaction with ECR public repositories.

[matiri132]

@ellisonc By a mistake i needed to recreate the PR from: #1293.
This new one has the rebased master branch.