[release-v1.16] Backport: Update to Java 21 (#74) #22

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Namespace: ocp-serverless-tenant
PipelineRun: kn-eventing-integrations-aws-ddb-streams-source-116-on-pulg2gpd

Status	Duration	Name
✅ Succeeded	16 seconds	init
✅ Succeeded	17 seconds	clone-repository
✅ Succeeded	1 minute	prefetch-dependencies
✅ Succeeded	4 minutes	build-images-deps
✅ Succeeded	22 seconds	build-image-index-deps
✅ Succeeded	2 minutes	build-images
✅ Succeeded	1 minute	build-image-index
✅ Succeeded	30 seconds	deprecated-base-image-check
✅ Succeeded	1 minute	build-source-image
✅ Succeeded	8 seconds	apply-tags
✅ Succeeded	3 minutes	clamav-scan
✅ Succeeded	1 minute	clair-scan
✅ Succeeded	1 minute	ecosystem-cert-preflight-checks
✅ Succeeded	22 seconds	sast-snyk-check
✅ Succeeded	20 seconds	rpms-signature-scan
✅ Succeeded	14 seconds	push-dockerfile
✅ Succeeded	16 seconds	sast-shell-check
✅ Succeeded	19 seconds	sast-unicode-check
✅ Succeeded	15 seconds	show-sbom