Combine release/tag workflow files

[vithikashah001]

Description
Consolidate tagging and release logic into a single workflow to bypass cross-workflow trigger limitations.

Fixes #384

How Has This Been Tested?
CI

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules
• New check tests, if applicable, are included
• make distcheck passes

[rem1776]

thanks for making these changes!

[ceblanton]

Thanks @vithikashah001 , this is exactly what we needed.

With this update, the procedure for releasing a new fre-nctools is as simple as updating the package version in configure.ac.

Then the tag-release job will detect the change to configure.ac and create a tag.

Then the create-release-dist job will create the release notes for a full release including the .tar artifacts.