fix: workspace provider to use the correct last used workspace #54

Namespace: <a href="https://detailurl.setting.custom-console-url-namespace.is.not.configured" rel="nofollow">konflux-ui-tenant
PipelineRun: <a href="https://console.redhat.com/application-pipeline/ns/konflux-ui-tenant/pipelinerun/konflux-ui-on-pull-request-45dpq" rel="nofollow">konflux-ui-on-pull-request-45dpq

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Status	Duration	Name
✅ Succeeded	6 seconds	init
✅ Succeeded	17 seconds	clone-repository
✅ Succeeded	3 minutes	build-container
✅ Succeeded	1 minute	clair-scan
✅ Succeeded	10 seconds	rpms-signature-scan
✅ Succeeded	8 seconds	apply-tags
✅ Succeeded	28 seconds	ecosystem-cert-preflight-checks
✅ Succeeded	31 seconds	push-dockerfile
✅ Succeeded	33 seconds	sast-snyk-check
✅ Succeeded	8 seconds	deprecated-base-image-check
✅ Succeeded	1 minute	clamav-scan
✅ Succeeded	8 seconds	show-sbom
✅ Succeeded	10 seconds	show-summary