build-galaxy-release.sh: Use build dir, new options, checks, no reset

The script is now using a build dir for the creation of the Ansible
Collection. Additionally only files known to the fit repo are pulled in
by default. The new "-a" option is pulling in all files from local repo.
The new -k" option can be used to keep the build dir for verification of
the changes to the files.

The colleciton is placed into the main repo dir and no git reset --hard
is used in the repo to preserve local changes.