Add shared, lazy SessionKeySupplier implementation #1238

Job	Run time
build_matrix	6m 9s
build (17, micronaut-docs-examples:micronaut-example-java:nativeTest)	11m 0s
build (17, test-suite-graal-function:nativeTest)	8m 45s
build (17, test-suite-graal-logging:nativeTest)	9m 4s
build (17, test-suite-java:nativeTest)	12m 27s
build (21, micronaut-docs-examples:micronaut-example-java:nativeTest)	11m 19s
build (21, test-suite-graal-function:nativeTest)	9m 17s
build (21, test-suite-graal-logging:nativeTest)	9m 17s
build (21, test-suite-java:nativeTest)	12m 16s
	1h 29m 34s

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