[JAVA] [PERF] improve java enum fromValue generation #926

Job	Run time
Build Java Client JDK17 (samples/client/petstore/java/restclient-nullable-arrays)	1m 37s
Build Java Client JDK17 (samples/client/petstore/java/restclient-useSingleRequestParameter)	2m 28s
Build Java Client JDK17 (samples/client/petstore/java/restclient)	2m 17s
Build Java Client JDK17 (samples/client/petstore/java/restclient-springBoot4-jackson2)	1m 53s
Build Java Client JDK17 (samples/client/petstore/java/webclient-jakarta)	1m 44s
Build Java Client JDK17 (samples/client/others/java/webclient-sealedInterface)	1m 43s
Build Java Client JDK17 (samples/client/petstore/java/resttemplate-springBoot4-jackson3)	47s
Build Java Client JDK17 (samples/client/petstore/java/resttemplate-jakarta)	1m 53s
Build Java Client JDK17 (samples/client/petstore/java/resttemplate-springBoot4-jackson2)	1m 51s
Build Java Client JDK17 (samples/client/petstore/java/restclient-springBoot4-jackson3)	42s
Build Java Client JDK17 (samples/client/petstore/java/webclient-springBoot4-jackson3)	42s
Build Java Client JDK17 (samples/client/petstore/java/restclient-useSingleRequestParameter-static)	2m 7s
Build Java Client JDK17 (samples/client/others/java/restclient-enum-in-multipart)	1m 40s
Build Java Client JDK17 (samples/client/petstore/java/webclient-useSingleRequestParameter)	1m 53s
Build Java Client JDK17 (samples/client/petstore/java/restclient-swagger2)	2m 13s
Build Java Client JDK17 (samples/client/others/java/webclient-sealedInterface_3_1)	1m 48s
	27m 18s

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