Generate smaller java runtime with jlink in Windows images

[lemeurherve]

What feature do you want to see added?

Generate smaller java runtime without unneeded files like it's done in Linux images:

docker-agent/debian/Dockerfile

Lines 32 to 51 in e2560a9

	# Generate smaller java runtime without unneeded files
	# for now we include the full module path to maintain compatibility
	# while still saving space (approx 200mb from the full distribution)
	RUN if test "${TARGETPLATFORM}" != 'linux/arm/v7'; then \
	case "$(jlink --version 2>&1)" in \
	# jlink version 11 has less features than JDK17+
	"11."*) strip_java_debug_flags=("--strip-debug") ;; \
	*) strip_java_debug_flags=("--strip-java-debug-attributes") ;; \
	esac; \
	jlink \
	--add-modules ALL-MODULE-PATH \
	"${strip_java_debug_flags[@]}" \
	--no-man-pages \
	--no-header-files \
	--compress=2 \
	--output /javaruntime; \
	# It is acceptable to have a larger image in arm/v7 (arm 32 bits) environment.
	# Because jlink fails with the error "jmods: Value too large for defined data type" error.
	else cp -r /opt/java/openjdk /javaruntime; \
	fi

Upstream changes

No response

Are you interested in contributing this feature?

Yes, I've already implemented it while working on #787

[lemeurherve]

I haven't open any PR yet as introducing jlink on Windows requires additional tests to ensure the absence of regressions.

[lemeurherve]

(Untested) implementation in the controller image: https://github.com/jenkinsci/docker/blob/e8d146c82a973969d3ea98b706ef0cf2ecae1964/windows/windowsservercore/hotspot/Dockerfile#L26-L46