Previously this was located in the source directory itself, but now
that we're using a temporary directory, there's no need for
pip-wheel-metadata.

Fix pip freeze not showing correct entry for mercurial packages that use subdirectories.

It's deprecated since https://github.com/actions/setup-python/commit/6f6fcee.

only got found after reverting `VersionControl.controls_location()`

Reverting `VersionControl.controls_location()` to pre PR state.  Its an optimization that belongs in another PR.

Removed `get_repo_root_dir()`, this functionality is now included in `Git.get_subdirectory()` and `Mercurial.get_subdirectory()`.

Added `find_path_to_setup_from_repo_root()` function to perform the
common parts of `get_subdirectory()`.

Add manylinux2014 support

update global install option test

PEP 599 defines manylinux2014 armv7l to be compatible with centos7 altarch armv7 i.e. armhf using the gnueabihf ABI

Per PEP 599:
https://www.python.org/dev/peps/pep-0599/

Move some initialization out of __init__

- Abstracted out common `get_subdirectory()` code in `Git` and `Mercurial`, adding `get_repo_root_dir()` for the vcs specific code.
- Reverted behaviour of `Git.controls_location()` and `Mercurial.controls_location()` to call the vcs command if the base `VersionControl.controls_location()` doesn't detect the vcs directory.
- Added `log_failed_cmd` argument `VcsSupport.run_command()` to allow vcs commands to be tried without logging errors if they aren't present.
- Corrected indentation.
- Removed `expect_stderr=True` in `test_freeze_mercurial_clone_srcdir` as its not required.

Saves >=10ms on irrelevant platforms.

Delete 1234.trival

Revert "Optimize upgrade of already-satisfied pinned requirement"

Rename tests.lib.path.Path.{abspath -> resolve()}