deps: update netty dependencies to v4.1.111.final #7228

Job	Run time
build (11)	12m 31s
build(21) except self-service clients	11m 14s
build(8) except for gapic-generator-java	4m 7s
build (17)	12m 31s
build(8) for gapic-generator-java	9m 34s
lint	21s
compatibility	1m 39s
dependency_analyzer_unit_test	14s
gapic-generator-java-bom	1m 46s
showcase (11)	4m 2s
showcase-clirr	3m 7s
showcase (17)	4m 4s
showcase-native	8m 17s
unmanaged_dependency_check	3m 49s
	1h 17m 16s

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