[ci] Make `[skip ci]` work anywhere in the PR title

[driazati]

We should parse out the tags here (the bits in between [ and ]) using tags_from_title in github_tag_teams.py and allow [skip ci] at any place in the PR

tvm/tests/scripts/git_skip_ci.py

Lines 49 to 50 in dccc1c7

	print("pr title:", title)
	return title.startswith("[skip ci]")

to avoid issues like in #11668 (review)

cc @Mousius @areusch