Deprecate `\markdownInfo`, `\markdownWarning`, and `\markdownError` #2550

Job	Run time
Style check (Lua)	41s
Style check (Python)	26s
Style check (Bash)	3s
Style check (Markdown)	49s
Type check (Python)	0s
Build Docker image	0s
Test Docker image	0s
Automatically merge pull request	0s
Publish Docker image	0s
Publish artefacts and create a prerelease	0s
	1m 59s

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