Rollup merge of #145448 - jieyouxu:rustfmt-labels, r=fmease

Autolabel `src/tools/{rustfmt,rust-analyzer}` changes with `T-{rustfmt,rust-analyzer}`

Make e.g. #144323 more obvious who should be reviewing it and easier to filter.

Author: Kobzol

triagebot.toml

@@ -627,6 +627,16 @@ trigger_files = [
     "src/ci",
 ]
 
+[autolabel."T-rust-analyzer"]
+trigger_files = [
+    "src/tools/rust-analyzer",
+]
+
+[autolabel."T-rustfmt"]
+trigger_files = [
+    "src/tools/rustfmt",
+]
+
 # ------------------------------------------------------------------------------
 # Prioritization and team nominations
 # ------------------------------------------------------------------------------