LCORE-1869: Add graceful teardown and automatic cleanup for llama-stack container #1802

Namespace: <a href="https://konflux-ui.apps.kflux-prd-rh02.0fk9.p1.openshiftapps.com/ns/lightspeed-core-tenant" rel="nofollow">lightspeed-core-tenant
PipelineRun: <a href="https://konflux-ui.apps.kflux-prd-rh02.0fk9.p1.openshiftapps.com/ns/lightspeed-core-tenant/pipelinerun/lightspeed-stack-on-pull-request-62gbk" rel="nofollow">lightspeed-stack-on-pull-request-62gbk

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Status	Duration	Name
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🟢 Succeeded	3 minutes	prefetch-dependencies
🟢 Succeeded	32 minutes	build-images
🟢 Succeeded	43 minutes	build-images
🟢 Succeeded	18 seconds	build-image-index
🟢 Succeeded	3 minutes	build-source-image
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🟢 Succeeded	2 minutes	clair-scan
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🟢 Succeeded	5 seconds	coverity-availability-check
🟢 Succeeded	14 seconds	deprecated-base-image-check
🟢 Succeeded	4 minutes	ecosystem-cert-preflight-checks
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🟢 Succeeded	5 seconds	push-dockerfile
🟢 Succeeded	5 minutes	rpms-signature-scan
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