Resolve status update issue for GitLab instances with relative paths

Issue:
For GitLab instances hosted under a relative path
(e.g., https://example.servehttp.com/gitlab),
status updates on MR fail to propagate correctly.
Although initial events like Repository CR creation,
starting PipelineRuns based on webhooks from GitLab,
reporting status on Pipeline start works fine.
subsequent updates (e.g., marking the PipelineRun as Finished)
do not reflect in GitLab, leaving the status stuck on Running state.

Root Cause:
When we have /gitlab relative path in the API we are getting
the wrong organization info because there is a function which
get Organization and Repository info again from URL

so for a GitLab API https://example.servehttp.com/gitlab/root/testpac
initially Organization and Repository value from GitLab coming
as root and testpac

But later in the event.go file we are refetching Organization and
Repository from event.URL because of that
Organization is coming as gitlab/root and
Repository as testpac.

that's why getting project info api call ex:
(https://example.servehttp.com/gitlab/api/v4/projects/gitlab/root/testpac)
is failing with 404 error

With this PR changes now status is getting updated successfully.

Signed-off-by: savitaashture <sashture@redhat.com>

pkg/formatting/vcs.go

@@ -3,7 +3,6 @@ package formatting
 import (
 	"fmt"
 	"net/url"
-	"path/filepath"
 	"strings"
 
 	"golang.org/x/text/cases"
@@ -51,7 +50,7 @@ func GetRepoOwnerSplitted(u string) (string, string, error) {
 	if len(parts) < 3 {
 		return "", "", fmt.Errorf("invalid repo url at least a organization/project and a repo needs to be specified: %s", u)
 	}
-	org := filepath.Join(parts[0 : len(parts)-1]...)
+	org := parts[len(parts)-2]
 	repo := parts[len(parts)-1]
 	return org, repo, nil
 }

pkg/provider/gitlab/gitlab_test.go

@@ -254,6 +254,8 @@ func TestSetClientDetectAPIURL(t *testing.T) {
 	assert.ErrorContains(t, err, "no git_provider.secret has been set")
 
 	event.Provider.Token = "hello"
+	event.TargetProjectID = 10
+	event.SourceProjectID = 10
 
 	v.repoURL, event.URL, event.Provider.URL = "", "", ""
 	event.URL = fmt.Sprintf("%s/hello-this-is-me-ze/project", fakehost)

pkg/reconciler/event.go

@@ -62,9 +62,9 @@ func buildEventFromPipelineRun(pr *tektonv1.PipelineRun) *info.Event {
 	event.URL = prAnno[keys.RepoURL]
 	// it's safer to get repo, org from repo.url since we have to remove the / and other chars in labels which drops
 	// the SubPath that gitlab is using.
-	repo, org, _ := formatting.GetRepoOwnerSplitted(event.URL)
-	event.Organization = repo
-	event.Repository = org
+	org, repo, _ := formatting.GetRepoOwnerSplitted(event.URL)
+	event.Organization = org
+	event.Repository = repo
 	event.EventType = prAnno[keys.EventType]
 	event.TriggerTarget = triggertype.StringToType(prAnno[keys.EventType])
 	event.BaseBranch = prAnno[keys.Branch]