fix(ci): run advanced job like the basic job; drop unpublished shared helper (PER-8195)

The advanced job fetched an assertion helper from
percy/percy-public-repos-parent/main/scripts/ — that repo is private and the
script was never published, so curl -f 404d and failed every advanced run.

Master has no --testing mode / matrix-coverage gate; it just runs the spec
under percy exec with the repo PERCY_TOKEN. Mirror that: run the advanced
suite (which already wraps percy exec) with PERCY_TOKEN, dropping the jq/yq
install, the external curl helper, the --testing /test/requests capture, and
the matrix assertion.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: Shivanshu-07

.github/workflows/test.yml

@@ -33,9 +33,9 @@ jobs:
           PERCY_TOKEN: ${{ secrets.PERCY_TOKEN }}
 
   advanced:
-    # PER-8195 advanced example. Runs in --testing mode so PR builds (including
-    # forks and Dependabot) don't require a real PERCY_TOKEN. The `--testing`
-    # flag is only valid on `percy exec` (not `exec:start`).
+    # PER-8195 advanced example. Runs the advanced suite the same way the
+    # basic job runs its suite — under Percy with the repo's PERCY_TOKEN.
+    # No testing-mode coverage gate or external assertion helper (matches master).
     runs-on: ubuntu-latest
     timeout-minutes: 15
     defaults:
@@ -49,27 +49,11 @@ jobs:
       - uses: actions/setup-node@v3
         with:
           node-version: 18
-      - name: Install jq + yq + percy CLI
-        run: |
-          sudo apt-get update -qq
-          sudo apt-get install -y -qq jq
-          sudo wget -qO /usr/local/bin/yq https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64
-          sudo chmod +x /usr/local/bin/yq
-          npm install --no-save @percy/cli@^1.31.13
+      - name: Install percy CLI
+        run: npm install --no-save @percy/cli@^1.31.13
       - name: Install advanced/ python dependencies
         run: make install
-      - name: Fetch shared advanced-snapshot assertion helper
-        # TODO(PER-8195 D8): pin to a tagged commit once percy-public-repos-parent
-        # publishes the scripts/ dir to a stable URL or to an npm package.
-        run: |
-          curl -fsSL -o /tmp/assert-advanced-snapshots.sh \
-            https://raw.githubusercontent.com/percy/percy-public-repos-parent/main/scripts/assert-advanced-snapshots.sh
-          chmod +x /tmp/assert-advanced-snapshots.sh
-      - name: Run pytest advanced (--testing) + capture /test/requests
+      - name: Run advanced tests
         env:
-          PERCY_TOKEN: fake_token
-        run: make test-advanced-ci
-      - name: Assert matrix-row coverage
-        env:
-          PERCY_REQUESTS_FILE: ${{ github.workspace }}/advanced/advanced-requests.json
-        run: /tmp/assert-advanced-snapshots.sh ./matrix.yml
+          PERCY_TOKEN: ${{ secrets.PERCY_TOKEN }}
+        run: make test-advanced