Improve the release pipeline

[tian-lt]

What

The tags submitted by the release pipeline are not associated to any branch because the commits were created on a local branch on pipeline agent which didn't go to the remote. This PR changes the way we manage our release versions. The changes are:

1. The new release pipeline extract version number from the CMakeList.txt file.
2. The new release pipeline assumes that all validations are passed over the latest commit of the main branch. Therefore, the pipeline is no longer run validations to save time and cost.
3. The new release pipeline requires a separated PR to bump the version number in the main branch.

Test

Sample pipeline results can be found at: https://github.com/tian-lt/proxy/releases and https://github.com/tian-lt/proxy/tags