Update bufbuild plugin references (sqlc-dev#2253)

* Update bufbuild plugin references

* newline

* codegen: Update generated code

---------

Co-authored-by: Kyle Conroy <kyle@conroy.org>

Author: mfridman

buf.gen.yaml

@@ -2,9 +2,9 @@ version: v1
 managed:
   enabled: true
 plugins:
-  - remote: buf.build/protocolbuffers/plugins/go:v1.28.1-1
+  - plugin: buf.build/protocolbuffers/go:v1.30.0
     out: internal
     opt: paths=source_relative
-  - remote: buf.build/planetscale/plugins/vtproto:v0.3.0
+  - plugin: buf.build/community/planetscale-vtprotobuf:v0.4.0
     out: internal
-    opt: paths=source_relative
+    opt: paths=source_relative