[GR-56166] Remove inline caching in NegotiateCompatibleEncodingNode and NegotiateCompatibleStringEncodingNode nodes #4863

Job	Run time
build native	13m 35s
ruby/spec on CRuby 3.0	3m 32s
ruby/spec on CRuby 3.1	3m 20s
build jvm	6m 43s
lint	14m 20s
ruby/spec on CRuby 3.2	3m 7s
test integration	9m 41s
fast specs	1m 59s
specs :truffle	14m 29s
specs :language :core	12m 55s
specs :library :cext :security :command_line :tracepoint	9m 36s
run MRI tests on native	14m 37s
test native	3m 23s
	1h 51m 17s

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