feat protobuf: mark fmt::formatter<>::parse as constexpr

Mark fmt::formatter<>::parse as constexpr and drop '*ViaChaosProxy' from the test exclusion list

---

Pull Request resolved: #1289

Co-authored-by: oigolovanova <oigolovanova@yandex-team.com>
commit_hash:ab89b9a0c8676dc869fb67dcffdf92b8b36714a4

Author: oigolovanova

.github/workflows/macos.yml

@@ -131,7 +131,6 @@ jobs:
                   TransactionDeathTest.AccessAfterCommit
                   TransactionDeathTest.AccessAfterRollback
                   PostgreCluster.TransactionTimeouts
-                  '*ViaChaosProxy'
                   HttpClient.HttpsWithCrl
                   HttpClient.HttpsWithNoClientCa
                   HttpClient.StatsOnTimeout