fix: improve metrics collection loop

by adding the context from main and make auth.GetAdminContext accepting a
context we are now able to stop the metrics collection loop once the
context is canceled

Signed-off-by: Mario Constanti <mario.constanti@mercedes-benz.com>

runner/repositories_test.go

@@ -59,7 +59,7 @@ type RepoTestSuite struct {
 }
 
 func (s *RepoTestSuite) SetupTest() {
-	adminCtx := auth.GetAdminContext()
+	adminCtx := auth.GetAdminContext(nil)
 
 	// create testing sqlite database
 	dbCfg := garmTesting.GetTestSqliteDBConfig(s.T())
@@ -90,7 +90,7 @@ func (s *RepoTestSuite) SetupTest() {
 	var minIdleRunners uint = 20
 	providerMock := runnerCommonMocks.NewProvider(s.T())
 	fixtures := &RepoTestFixtures{
-		AdminContext: auth.GetAdminContext(),
+		AdminContext: auth.GetAdminContext(nil),
 		Store:        db,
 		StoreRepos:   repos,
 		Providers: map[string]common.Provider{