Move building and release to GHA

[ronaldtse]

As title.

[rrrooommmaaa]

@dewyatt @ronaldtse Looks like we need to add secrets.PACKAGE_SIGNING_KEY_BASE64 and secrets.GITHUB_YUM_DEPLOY_KEY_BASE64 here. Also, there is github-release stage here, so I would need GITHUB_API_TOKEN too.
Do we still need to keep references to github.com/riboseinc/rpm-specs ?

[skalee]

@rrrooommmaaa You should have GitHub API token for the current repo out of the box. (Am I correct that this is the issue?) See: https://help.github.com/en/actions/configuring-and-managing-workflows/authenticating-with-the-github_token.

[ronaldtse]

@rrrooommmaaa sorry for missing this!

We do not need to reference https://github.com/riboseinc/rpm-specs .

@ribose-jeffreylau could you help setup these secrets (org-wide):

• PACKAGE_SIGNING_KEY_BASE64
• GITHUB_YUM_DEPLOY_KEY_BASE64

Thanks!