[FLINK-36510][rpc] Bump Pekko to 1.1.2, remove Netty 3 #1141

Job	Run time
Default (Java 11) / Compile	41m 9s
Pre-compile Checks / Basic QA	5m 21s
Default (Java 11) / E2E (group 1)	1h 58m 3s
Default (Java 11) / Test packaging/licensing	39m 2s
Default (Java 11) / Test (module: core)	31m 48s
Default (Java 11) / E2E (group 2)	2h 17m 42s
Default (Java 11) / Test (module: python)	28m 51s
Default (Java 11) / Test (module: table)	36m 57s
Default (Java 11) / Test (module: connect)	23m 1s
Default (Java 11) / Test (module: tests)	36m 57s
Default (Java 11) / Test (module: misc)	29m 15s
	8h 48m 6s

Provide feedback