Merge pull request #303217 from deshaw/buildGoModule-setSourceRoot

buildGoModule: propagate setSourceRoot

pkgs/build-support/go/module.nix

···
     preBuild = args.preBuild or "";
     postBuild = args.modPostBuild or "";
     sourceRoot = args.sourceRoot or "";
+    setSourceRoot = args.setSourceRoot or "";
     env = args.env or { };
 
     impureEnvVars = lib.fetchers.proxyImpureEnvVars ++ [