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/app/run/proxy.go

@@ -120,7 +120,7 @@ func proxyPasswords() []string {
 	var passwords []string
 	for _, raw := range []string{cfg.HTTPProxy, cfg.HTTPSProxy} {
 		parsed, err := url.Parse(raw)
-		if err != nil || parsed.User == nil {
+		if err != nil {
 			continue
 		}
 		if password, ok := parsed.User.Password(); ok && password != "" && !slices.Contains(passwords, password) {
@@ -152,11 +152,8 @@ func appendNoProxy(noProxy string, hosts ...string) string {
 // hostOf returns the host of a URL without its port, the form a no_proxy entry takes. It is
 // empty for anything without a network host, such as a unix socket.
 func hostOf(raw string) string {
-	if raw == "" {
-		return ""
-	}
 	parsed, err := url.Parse(strings.TrimSuffix(raw, "/"))
-	if err != nil || parsed.Hostname() == "" {
+	if err != nil {
 		return ""
 	}
 	return parsed.Hostname()