Add static analyzer to discourage use of panic() (#15075)

* Implement static analysis to prevent panics

* Add nopanic to nogo

* Fix violations and add exclusions

Fix violations and add exclusions for all

* Changelog fragment

* Use pass.Report instead of pass.Reportf

* Remove strings.ToLower for checking init method name

* Add exclusion for herumi init

* Move api/client/beacon template function to init and its own file

* Fix nopanic testcase

cmd/client-stats/main.go

@@ -69,7 +69,7 @@ func main() {
 		case "fluentd":
 			f := joonix.NewFormatter()
 			if err := joonix.DisableTimestampFormat(f); err != nil {
-				panic(err)
+				panic(err) // lint:nopanic -- This shouldn't happen, but crashing immediately at startup is OK.
 			}
 			logrus.SetFormatter(f)
 		case "json":
@@ -94,7 +94,7 @@ func main() {
 	defer func() {
 		if x := recover(); x != nil {
 			log.Errorf("Runtime panic: %v\n%v", x, string(runtimeDebug.Stack()))
-			panic(x)
+			panic(x) // lint:nopanic -- This is just resurfacing the original panic.
 		}
 	}()