ci: update release pipeline for the artifacts repository

[apolikamixitos]

What:

Add a new process to release Axelar GMP SDK Solidity packages and contracts.

create-release-pr Workflow:

Ensures that the changes introduced are ready to get published, as the name suggests, it's a step that creates a PR that could be double-checked before proceeding with publishing a release based on a specific "branch".

release Workflow:

This workflow ensures:

• The new versions of the package @axelar-network/axelar-gmp-sdk-solidity are published on npm.

• New releases/tags are published on Github:

  • Includes the source code of the package.
  • The package-related assets (contracts ABIs associated with its corresponding package version).

• Artifacts being published to R2 as a secondary backup source and distribution channel:

release-snapshot Workflow:

• It's used mainly for nightly || ad-hoc triggered builds for testing purposes only, they aren't supposed to be used for production environments.

Notes:

Some requisites need to take place before merging the PR:

• Ensure that the proper vars and secrets are set up in the repository config.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.66%. Comparing base (9847262) to head (5054c09).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #193   +/-   ##
=======================================
  Coverage   98.66%   98.66%           
=======================================
  Files          47       47           
  Lines         747      747           
  Branches      154      154           
=======================================
  Hits          737      737           
  Misses          1        1           
  Partials        9        9           

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