CXX-3099 use for-each-ref for Git 2.43 compatibility

[eramongodb]

Addresses rhel76 task failure in proposed changes to #1381 due to the available git version (2.43.6) not supporting the --format flag used by calc_release_version.py.

This PR proposes changing the git command from git tag --list to git for-each-ref "refs/tags/*", as for-each-ref is supported by 2.43 and also supports the required --format flag.

Note

This PR also includes the same update to self-test scripts in #1379. Either PR may be merged first.

[eramongodb]

Continuing to fail for GitHub PR patch builds, this time with the following error:

fatal: unknown refname: format strip=2
Traceback (most recent call last):
  File "etc/calc_release_version.py", line 372, in <module>
    RELEASE_VER = main()
                  ^^^^^^
  File "etc/calc_release_version.py", line 346, in main
    branch_tags = get_branch_tags(active_branch_name)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "etc/calc_release_version.py", line 236, in get_branch_tags
    tags_by_obj = get_object_tags()
                  ^^^^^^^^^^^^^^^^^
  File "etc/calc_release_version.py", line 269, in get_object_tags
    for obj, tagobj, tag in iter_tag_lines():
  File "etc/calc_release_version.py", line 253, in iter_tag_lines
    output = check_output(['git', 'for-each-ref', '--format=%(*objectname)|%(objectname)|%(refname:strip=2)', 'refs/tags/*'])
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "etc/calc_release_version.py", line 131, in check_output
    raise subprocess.CalledProcessError(ret, args[0])
subprocess.CalledProcessError: Command 'git' returned non-zero exit status 128.