fix(ci): install Playwright Chromium in deploy test job

The Deploy workflow test job runs  ERR_PNPM_NO_IMPORTER_MANIFEST_FOUND  No package.json (or package.yaml, or package.json5) was found in "/home/lc/Documents/Checkouts/github.com/ZeroPathAI/openerrata"., which includes extension e2e tests via Playwright. After adding e2e to the shared test script, deploy CI started failing because browsers were not installed in this workflow.

Add the same browser install step used in release workflows:
- Installing dependencies...
Switching to root user to install dependencies...
Failed to install browsers
Error: Installation process exited with code: 1
undefined
/home/lc/Documents/Checkouts/github.com/ZeroPathAI/openerrata/src/typescript/extension:
 ERR_PNPM_RECURSIVE_EXEC_FIRST_FAIL  Command failed with exit code 1: playwright install --with-deps chromium

This keeps deploy CI aligned with the repo test contract and unblocks downstream deploy/promote jobs.

Author: hugbubby

.github/workflows/deploy.yml

@@ -294,6 +294,9 @@ jobs:
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
+      - name: Install Playwright Chromium
+        run: pnpm --filter @openerrata/extension exec playwright install --with-deps chromium
+
       - name: Generate Prisma client
         run: pnpm db:generate