Add terminationMessagePolicy and required-scc annotation for OCP 4.21 conformance #411

Namespace: <a href="https://konflux-ui.apps.kflux-prd-rh03.nnv1.p1.openshiftapps.com/ns/splunk-forwarder-operator-tenant" rel="nofollow">splunk-forwarder-operator-tenant
PipelineRun: <a href="https://konflux-ui.apps.kflux-prd-rh03.nnv1.p1.openshiftapps.com/ns/splunk-forwarder-operator-tenant/pipelinerun/splunk-forwarder-operator-e2e-on-pull-request-wmclt" rel="nofollow">splunk-forwarder-operator-e2e-on-pull-request-wmclt

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Status	Duration	Name
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🟢 Succeeded	7 seconds	clone-repository
🟢 Succeeded	11 seconds	prefetch-dependencies
🟢 Succeeded	2 minutes	build-container
🟢 Succeeded	13 seconds	build-image-index
🟢 Succeeded	5 seconds	apply-tags
🟢 Succeeded	7 seconds	coverity-availability-check
🟢 Succeeded	13 seconds	deprecated-base-image-check
🟢 Succeeded	26 seconds	clair-scan
🟢 Succeeded	15 seconds	rpms-signature-scan
🟢 Succeeded	17 seconds	ecosystem-cert-preflight-checks
🟢 Succeeded	7 seconds	push-dockerfile
🟢 Succeeded	11 seconds	sast-shell-check
🟢 Succeeded	9 seconds	sast-unicode-check
🟢 Succeeded	8 seconds	sast-snyk-check
🟢 Succeeded	24 seconds	clamav-scan
🟢 Succeeded	10 seconds	show-sbom