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/config/edit.go

@@ -277,7 +277,7 @@ func mappingValue(mapping *yaml.Node, key string) *yaml.Node {
 }
 
 func renderNode(node *yaml.Node) (string, error) {
-	if !allScalars(node.Content) {
+	if slices.ContainsFunc(node.Content, func(child *yaml.Node) bool { return child.Kind != yaml.ScalarNode }) {
 		encoded, err := encodeYAML(node)
 		if err != nil {
 			return "", err
@@ -303,15 +303,6 @@ func renderNode(node *yaml.Node) (string, error) {
 	}
 }
 
-func allScalars(nodes []*yaml.Node) bool {
-	for _, node := range nodes {
-		if node.Kind != yaml.ScalarNode {
-			return false
-		}
-	}
-	return true
-}
-
 // encodeYAML never wraps lines, re-encoding must not reflow long values.
 func encodeYAML(node *yaml.Node) ([]byte, error) {
 	return yaml.Dump(node, yaml.WithV3Defaults(), yaml.WithIndent(2), yaml.WithLineWidth(-1))