Adds Provost radio & radio channel

[realforest2001]

About the pull request

Gives Provost their own radio channel. Didn't make much sense to me the amount of people who have High Command radios and access to all that entails. This splits off all the Non-Marshal (General) level provost to their own radio.

Also removes ignore_z from High Command radios because it prevents marines being able to hear what is said on their channels by a radio with ignore_z.

Explain why it's good for the game

A bit of depth, and to differentiate from High Command and Provost explicit.

Testing Photographs and Procedure

Screenshots & Videos

Put screenshots and videos here with an empty line between the screenshots and the <details> tags.

Changelog

🆑
add: Added a Provost radio & channel.
qol: Changed High Command radio to have most channels off by default.
del: Removed ignore_z from High Command radios.
/:cl:

[github-actions]

This PR has been inactive for long enough to be automatically marked as stale. This means it is at risk of being auto closed in ~ 7 days, please address any outstanding review items and ensure your PR is finished, if these are all true and you are auto-staled anyway, you need to actively ask maintainers if your PR will be merged. Once you have done any of the previous actions then you should request a maintainer remove the stale label on your PR, to reset the stale timer. If you feel no maintainer will respond in that time, you may wish to close this PR youself, while you seek maintainer comment, as you will then be able to reopen the PR yourself