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/api/v1/api.go

@@ -795,7 +795,7 @@ func mustEnableIssuesOrPulls(ctx *context.APIContext) {
 }
 
 func mustEnableWiki(ctx *context.APIContext) {
-	if !(ctx.Repo.Permission.CanRead(unit.TypeWiki)) {
+	if !ctx.Repo.Permission.CanRead(unit.TypeWiki) {
 		ctx.APIErrorNotFound()
 		return
 	}