Added allowed_workflows to pytorch probot (#7485)

Author: DanilBaibak

.github/pytorch-probot.yml

@@ -1 +1,10 @@
 tracking_issue: 2447
+
+# List of workflows that will be re-run in case of failures
+# https://github.com/pytorch/test-infra/blob/main/torchci/lib/bot/retryBot.ts
+allowed_workflows:
+- Build Linux
+- Build Macos
+- Build M1
+- Tests on Linux
+- Tests on macOS