Rollup merge of #114708 - tgross35:tgross35-patch-1, r=Mark-Simulacrum

Allow setting `rla` labels via `rustbot`

rust-lang/rust-log-analyzer#75 adds a `rla-silenced` label flag that will turn off RLA updates for non-bors tests. Allow setting that labels and others via `rustbot`.

Author: compiler-errors

Diff for: triagebot.toml

@@ -18,6 +18,7 @@ allow-unauthenticated = [
     "relnotes",
     "requires-*",
     "regression-*",
+    "rla-*",
     "perf-*",
     "AsyncAwait-OnDeck",
     "needs-triage",