Upgrade to Go 1.22 and Node v20 (#2861)

* Remove workaround for missing `context.WithoutCancel` in Go 1.20

* Upgrade to Go 1.22

* Upgrade GitHub Actions

* Upgrade Node to v20

scanner/rescanall.go

@@ -1,11 +0,0 @@
-//go:build go1.21
-
-package scanner
-
-import (
-	"context"
-)
-
-func contextWithoutCancel(ctx context.Context) context.Context {
-	return context.WithoutCancel(ctx)
-}

scanner/rescanall_go1.20.go

@@ -1,12 +0,0 @@
-//go:build !go1.21
-
-package scanner
-
-import (
-	"context"
-)
-
-// TODO Remove this file when we drop support for go 1.20
-func contextWithoutCancel(ctx context.Context) context.Context {
-	return context.TODO()
-}

scanner/scanner.go

@@ -178,7 +178,7 @@ func (s *scanner) setStatusEnd(folder string, lastUpdate time.Time) {
 }
 
 func (s *scanner) RescanAll(ctx context.Context, fullRescan bool) error {
-	ctx = contextWithoutCancel(ctx)
+	ctx = context.WithoutCancel(ctx)
 	if !isScanning.TryLock() {
 		log.Debug(ctx, "Scanner already running, ignoring request for rescan.")
 		return ErrAlreadyScanning