Remove UT and Linux Build CI from GitHub Actions

[wlwilliamx]

Description

We have successfully integrated the CI workflows for unit tests, static checks, and Linux build to our own infrastructure. As a result, the corresponding CI jobs on GitHub Actions are no longer required and should be removed to avoid redundancy and potential conflicts.

Tasks

• Remove the GitHub Actions workflows for:
  • Unit tests (UT)
  • Linux build
• Verify that no dependencies on these workflows remain in the repository.
• Ensure all other CI jobs are unaffected.

Note

This change will streamline the CI process and focus on using our own infrastructure for the above tasks.