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]>

act/common/git/git.go

@@ -79,25 +79,25 @@ func (e *Error) Unwrap() error  { return e.err }
 func (e *Error) Commit() string { return e.commit }
 
 // FindGitRevision get the current git revision
-func FindGitRevision(ctx context.Context, file string) (shortSHA, sha string, err error) {
+func FindGitRevision(ctx context.Context, file string) (string, error) {
 	logger := common.Logger(ctx)
-	sha, err = gitOutput(ctx, file, "rev-parse", "--verify", "HEAD^{commit}")
+	sha, err := gitOutput(ctx, file, "rev-parse", "--verify", "HEAD^{commit}")
 	if err != nil {
 		logger.WithError(err).Error("path", file, "not located inside a git repository")
-		return "", "", err
+		return "", err
 	}
 	if len(sha) < 7 {
-		return "", "", errors.New("HEAD could not be resolved")
+		return "", errors.New("HEAD could not be resolved")
 	}
 	logger.Debugf("Found revision: %s", sha)
-	return sha[:7], sha, nil
+	return sha, nil
 }
 
 // FindGitRef get the current git ref
 func FindGitRef(ctx context.Context, file string) (string, error) {
 	logger := common.Logger(ctx)
 	logger.Debugf("Loading revision from git directory")
-	_, revision, err := FindGitRevision(ctx, file)
+	revision, err := FindGitRevision(ctx, file)
 	if err != nil {
 		return "", err
 	}