Rollup merge of #141496 - Urgau:triagebot_issue_link_no-mentions, r=Kobzol

Enable `[issue-links]` and `[no-mentions]` in triagebot

This PR enables the [`[issue-links]`](https://forge.rust-lang.org/triagebot/issue-links.html) and [`[no-mentions]`](https://forge.rust-lang.org/triagebot/no-mentions.html) handlers of triagebot.

Most of our subtrees have already adopted them:
 - rust-lang/rust-analyzer#19555
 - rust-lang/rust-clippy#14563 & rust-lang/rust-clippy#14576
 - rust-lang/rustc-dev-guide#2335
 - rust-lang/miri#4259
 - rust-lang/reference#1788

r? `@Kobzol`

Author: matthiaskrgr

triagebot.toml

@@ -1423,3 +1423,12 @@ compiletest = [
 
 [behind-upstream]
 days-threshold = 14
+
+# Canonicalize issue numbers to avoid closing the wrong issue
+# when commits are included in subtrees, as well as warning links in commits.
+# Documentation at: https://forge.rust-lang.org/triagebot/issue-links.html
+[issue-links]
+
+# Prevents mentions in commits to avoid users being spammed
+# Documentation at: https://forge.rust-lang.org/triagebot/no-mentions.html
+[no-mentions]