Avoid running action when action unit is disabled after workflows detected (#30331)

Fix #30243

We only checking unit disabled when detecting workflows, but not in
runner `FetchTask`.
So if a workflow was detected when action unit is enabled, but disabled
later, `FetchTask` will still return these detected actions.

Global setting: repo.ENABLED and repository.`DISABLED_REPO_UNITS` will
not effect this.

models/actions/task.go

@@ -11,6 +11,7 @@ import (
 
 	auth_model "code.gitea.io/gitea/models/auth"
 	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/models/unit"
 	"code.gitea.io/gitea/modules/container"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
@@ -227,7 +228,9 @@ func CreateTaskForRunner(ctx context.Context, runner *ActionRunner) (*ActionTask
 	if runner.RepoID != 0 {
 		jobCond = builder.Eq{"repo_id": runner.RepoID}
 	} else if runner.OwnerID != 0 {
-		jobCond = builder.In("repo_id", builder.Select("id").From("repository").Where(builder.Eq{"owner_id": runner.OwnerID}))
+		jobCond = builder.In("repo_id", builder.Select("id").From("repository").
+			Join("INNER", "repo_unit", "`repository`.id = `repo_unit`.repo_id").
+			Where(builder.Eq{"`repository`.owner_id": runner.OwnerID, "`repo_unit`.type": unit.TypeActions}))
 	}
 	if jobCond.IsValid() {
 		jobCond = builder.In("run_id", builder.Select("id").From("action_run").Where(jobCond))