chore(pgproto): add a test for large messages
Summary
- chore(pgproto): add a test for large messages
- Close #...
- Cherry-pick to: none / 24.4 / 24.3 / 24.2
- Docs follow-up: not necessary / new issue
Previous attempt: !1017 (closed)
Ref: #838
Edited by Dmitry Ivanov