refactor: remove dead code and consolidate tests (#1335)

Removes dead code and redundant logic and consolidates tests, so there is less to read and maintain. No behavior change.

1. **act/runner**: inline single-use wrappers, compile regexes once instead of per call, embed the trampoline as a string, drop the unused legacy result of `parseActionCommand`
2. **act/container**: `sanitizeConfig` and `mergeContainerConfigs` stop returning the configs they already mutate in place, drop never-set option fields and the unused `user` parameter of `ExecWithCmdLine`
3. **act/common and cache server**: drop the unused `Trace`/`Tracef` loggers and the short SHA of `FindGitRevision`, `RegisterJob` releases through `RevokeJob`
4. **daemon, poller and reporter**: one shutdown wait for both poll modes, drop an unreachable fetch timeout branch, guard the reporter's last report time with its existing lock instead of an atomic
5. **build**: drop unused Makefile and release workflow variables, collapse the goreleaser ignore list to the same build targets
6. **tests**: fold near-duplicate tests into tables with shared setup

Throughout, hand-rolled logic gives way to `cmp.Or`, `strings.Cut`, `slices` and `min`/`max`.

Reviewed-on: https://gitea.com/gitea/runner/pulls/1335
Reviewed-by: bircni <[email protected]>
Co-authored-by: silverwind <[email protected]>

internal/pkg/action/checkout/checkout.go

@@ -56,7 +56,7 @@ func Main(ctx context.Context, c *action.Context) (err error) {
 	ref := c.Inputs["ref"]
 	sshKey := strings.TrimSpace(c.Inputs["ssh-key"])
 	isWorkflowRepo := strings.EqualFold(repository, ghc.Repository)
-	local := isWorkflowRepo && slices.Contains([]string{"", shortBranch(ghc.Ref), ghc.Sha}, shortBranch(ref)) && !c.NoSkipCheckout && sshKey == ""
+	local := isWorkflowRepo && slices.Contains([]string{"", strings.TrimPrefix(ghc.Ref, "refs/heads/"), ghc.Sha}, strings.TrimPrefix(ref, "refs/heads/")) && !c.NoSkipCheckout && sshKey == ""
 	if local && (!c.BindWorkdir || dst == c.Workspace) {
 		if !c.BindWorkdir {
 			if err := c.Container.CopyDir(dst, c.HostWorkdir+string(filepath.Separator)+".", c.UseGitIgnore, false)(ctx); err != nil {
@@ -470,7 +470,3 @@ func fetchDepth(input string) (int, error) {
 	}
 	return depth, nil
 }
-
-func shortBranch(ref string) string { // full tag refs stay exact
-	return strings.TrimPrefix(ref, "refs/heads/")
-}