Always run postbuild scripts

Since we no longer build JSDoc, SassDoc or stats via Gulp we can turn these back on

.github/workflows/actions/build/action.yml

@@ -25,6 +25,5 @@ runs:
       if: steps.build-cache.outputs.cache-hit != 'true'
       shell: bash
 
-      # Build all workspaces but skip `postbuild` scripts
-      # since we run these in other workflow steps instead
-      run: npm run build --workspaces --if-present --ignore-scripts
+      # Build all workspaces
+      run: npm run build --workspaces --if-present

.github/workflows/tests.yml

@@ -218,11 +218,11 @@ jobs:
         task:
           - description: Verify package build
             name: test-build-package
-            run: npm run build:package -- --ignore-scripts
+            run: npm run build:package
 
           - description: Verify distribution build
             name: test-build-release
-            run: npm run build:release -- --ignore-scripts
+            run: npm run build:release
 
     steps:
       - name: Checkout

package.json

@@ -29,7 +29,7 @@
     "build:types": "npm run build:types --workspaces --if-present",
     "postbuild:package": "jest --color --selectProjects \"Build tasks\" --testMatch \"**/build/package.unit.test.mjs\"",
     "postbuild:release": "jest --color --selectProjects \"Build tasks\" --testMatch \"**/build/release.unit.test.mjs\"",
-    "heroku-postbuild": "npm run build -- --ignore-scripts",
+    "heroku-postbuild": "npm run build",
     "postheroku-postbuild": "NPM_CONFIG_PRODUCTION=true npm ci --ignore-scripts --omit=optional --workspace @govuk-frontend/review",
     "pretest": "npm run build",
     "test": "jest --color --ignoreProjects \"Build tasks\" --maxWorkers=50%",