Micronaut 5 compatibility and release prep #1625

Job	Run time
build_matrix	4m 10s
build (21, test-suite-graal:test-suite-graal-pebble:nativeTest)	9m 36s
build (21, test-suite-graal:test-suite-graal-soy:nativeTest)	8m 9s
build (21, test-suite-graal:test-suite-graal-freemarker:nativeTest)	6m 14s
build (21, test-suite-graal:test-suite-graal-handlebars:nativeTest)	7m 1s
build (21, test-suite-graal:test-suite-graal-jte:nativeTest)	6m 58s
build (21, test-suite-jte-fieldset:nativeTest)	12m 0s
build (21, test-suite-graal:test-suite-graal-rocker:nativeTest)	5m 0s
build (21, test-suite-graal:test-suite-graal-thymeleaf:nativeTest)	1s
build (21, test-suite-graal:test-suite-graal-velocty:nativeTest)	12m 0s
	1h 11m 9s

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