Fix LavaMoat policy generation script (#15668)

Recently in #15468 the name of the scripts task used by the LavaMoat
policy generation script was renamed from `scripts:prod` to
`scripts:dist`, but we neglected to change this name in the LavaMoat
policy generation script itself.

The script task has now been updated so that the script works again,
and the LavaMoat policy generation script has been re-run.

development/generate-lavamoat-policies.js

@@ -36,7 +36,7 @@ async function start() {
   await concurrently(
     (Array.isArray(buildTypes) ? buildTypes : [buildTypes]).map(
       (buildType) => ({
-        command: `yarn build scripts:prod --policy-only --build-type=${buildType}`,
+        command: `yarn build scripts:dist --policy-only --build-type=${buildType}`,
         env: {
           WRITE_AUTO_POLICY: 1,
         },