Add metrics related to virtual threads #7012

Job	Run time
build	6m 21s
shellcheck	3m 16s
checkstyle	4m 2s
copyright	3m 28s
spotbugs/core	11m 4s
tests/core	11m 3s
spotbugs/integrations	7m 27s
tests/it	14m 31s
tests/tck-cdi	17m 52s
spotbugs/others	13m 7s
tests/dbclient	9m 8s
archetypes/r1-jar	6m 55s
tests/tck-rest	15m 13s
tests/dbclient-oracle	16m 19s
tests/tck-others	17m 5s
docs	4m 53s
archetypes/r2-jar	6m 59s
tests/others	13m 2s
archetypes/r3-jar	5m 58s
archetypes/r4-jar	6m 51s
examples/linux	12m 58s
javadoc (core)	7m 9s
archetypes/legacy	5m 1s
archetypes/r5-jar	5m 34s
examples/macos	9m 39s
javadoc (integrations)	5m 36s
javadoc (others)	8m 13s
tests/packaging-jar-linux	6m 7s
quickstarts/linux	12m 35s
tests/packaging-jlink-linux	6m 11s
quickstarts/macos	16m 34s
tests/native-image-mp-1-linux	6m 59s
tests/packaging-jar-macos	5m 44s
tests/native-image-mp-2-linux	7m 24s
tests/packaging-jlink-macos	6m 6s
tests/native-image-mp-3-linux	6m 42s
tests/native-image-se-1-linux	6m 44s
tests/native-image-inject-linux	6m 30s
tests/native-image-mp-1-macos	7m 33s
tests/native-image-mp-2-macos	7m 32s
tests/native-image-mp-3-macos	7m 23s
tests/native-image-se-1-macos	6m 20s
tests/native-image-inject-macos	7m 13s
tests/results	0s
gate	0s
	6h 12m 21s

Provide feedback