chore(STONEINTG-1189): annotate build PLR when component is missing

or not found. This fixes a silent failure scenario where the Build
PipelineRun would stall if the appstudio.openshift.io/component
label was incorrect, no found or missing entirely.

Changes:
* Added logic to catch "Component Not Found" errors during the
loader phase.
* Added logic to catch cases where the component label is nil.
* In both cases, the PipelineRun is now annotated with
test.appstudio.openshift.io/create-snapshot-status="failed".
* Ensured the Finalizer is still correctly removed if the
component is not found, allowing the resource to be deleted.

Testing:

* Added unit tests in buildpipeline_controller_test.go covering
both the not found scenario and the missing label scenario.

Generated by: Cursor

Signed-off-by: jcullina <[email protected]>

Author: jencull

internal/controller/buildpipeline/buildpipeline_controller.go

@@ -19,6 +19,7 @@ package buildpipeline
 import (
 	"context"
 	"fmt"
+	
 	"github.com/konflux-ci/integration-service/cache"
 	"k8s.io/client-go/util/retry"