Add more triagebot labeling support

Author: ehuss

triagebot.toml

@@ -1,3 +1,8 @@
+[relabel]
+allow-unauthenticated = [
+    "S-*", "A-*", "Edition-*", "bug", "enhancement", "question",
+]
+
 [assign]
 
 [relabel]
@@ -8,3 +13,14 @@
 remove = []
 add = ["S-waiting-on-author"]
 unless = ["S-blocked", "S-waiting-on-review"]
+
+[autolabel."S-waiting-on-review"]
+new_pr = true
+
+[review-submitted]
+reviewed_label = "S-waiting-on-author"
+review_labels = ["S-waiting-on-review"]
+
+[review-requested]
+remove_labels = ["S-waiting-on-author"]
+add_labels = ["S-waiting-on-review"]