Add umask as a global state argument

[terminalmage]

This removes the umask argument from cmd states and makes it a global state argument.

[garethgreenaway]

@terminalmage Looks good. My only comment is on the change in doc/ref/states/requisites.rst, why this is temporary? Also we need a changelog file added and the pre-commit test is failing.

[terminalmage]

It's temporary because the umask is only changed for the lifetime of a single state.

Perhaps the wording can be improved?

[garethgreenaway]

@terminalmage Thanks. That makes more sense. My first impression was that it was being changed for just the 3002 release and would change to a different approach in the future.

[terminalmage]

@garethgreenaway Cool. Should this just be considered an "added" changelog entry even though umask argument has been removed from the "cmd" state module here? The functionality will remain the same for cmd states.

[terminalmage]

Also, can the changelog files contain markdown? This is not clear from the docs.

[garethgreenaway]

@terminalmage I would make it an "changed" change since you're remove the umask argument from cmd in favor of it using the global one. It looks like town crier does have support for using markdown.

[terminalmage]

OK, thanks. Changelog file added.

[Ch3LL]

@terminalmage mind resolving the merge conflicts?

[terminalmage]

Merge conflicts removed, tests re-done and passing

[max-arnold]

The 3002 version number in the docs need to be changed to 3006: https://docs.saltproject.io/en/master/ref/states/requisites.html#run-state-with-a-different-umask