chore: update Go to v1.27 (#39068)

Only made some necessary changes:

1. remove `GOEXPERIMENT`, only use jsonv2
1. `make fmt`
* `SigningKey` and `Signature` were affected due to some bugs in the
toolchain, so rewrote them
1. remove or fix fragile magic numbers and strings
    * the outputs of image/gzip/zlib packages are different
1. update "nolint" comments for the changed lint behaviors
1. add `tls.MLKEM1024`

routers/web/admin/diagnosis.go

@@ -70,7 +70,7 @@ func MonitorDiagnosis(ctx *context.Context) {
 	for _, record := range tailmsg.GetManager().GetTraceRecorder().GetRecords() {
 		_, _ = f.Write(util.UnsafeStringToBytes(record.Time.Format(time.RFC3339)))
 		_, _ = f.Write([]byte(" "))
-		_, _ = f.Write(util.UnsafeStringToBytes((record.Content)))
+		_, _ = f.Write(util.UnsafeStringToBytes(record.Content))
 		_, _ = f.Write([]byte("\n\n"))
 	}
 }