Replace nearly every map grep with a YML file that actually respects structure, and fixes the massive amount of failures that were never caught #6185

	name: Codeowner Reviews

	# Controls when the workflow will run
	on: pull_request_target

	jobs:
	assign-users:
	runs-on: ubuntu-latest

	steps:
	# Checks-out your repository under $GITHUB_WORKSPACE, so the job can access it
	- uses: actions/checkout@v3

	#Parse the Codeowner file
	- name: CodeOwnersParser
	id: CodeOwnersParser
	uses: tgstation/CodeOwnersParser@v1

	#Request reviews
	- name: Request reviews
	if: steps.CodeOwnersParser.outputs.owners != ''
	uses: tgstation/RequestReviewFromUser@v1
	with:
	separator: " "
	users: ${{ steps.CodeOwnersParser.outputs.owners }}

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