[FLINK-36510][rpc] Bump Pekko to 1.1.2, remove Netty 3 #1186

Job	Run time
Pre-compile Checks / Basic QA	7m 42s
Default (Java 8) / Compile	11m 20s
Default (Java 8) / E2E (group 1)	1h 10m 30s
Default (Java 8) / Test (module: core)	35m 33s
Default (Java 8) / E2E (group 2)	2h 19m 2s
Default (Java 8) / Test packaging/licensing	36m 55s
Default (Java 8) / Test (module: python)	30m 49s
Default (Java 8) / Test (module: table)	58m 10s
Default (Java 8) / Test (module: connect)	18m 58s
Default (Java 8) / Test (module: tests)	45m 46s
Default (Java 8) / Test (module: misc)	42m 33s
	8h 17m 18s

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