Disable yarn cache for Node 22 in Pro CI to fix V8 crash

The Pro integration tests were failing with a Node.js V8 engine crash
(unreachable code fatal error) when trying to get yarn cache folder.
This is a known bug in Node 22.21.0 (nodejs/node#56010).

The main integration-tests.yml already had this workaround, but
pro-integration-tests.yml was missing it. This change disables yarn
caching for Node 22 in all three jobs in the Pro workflow:
- build-dummy-app-webpack-test-bundles
- rspec-dummy-app-node-renderer
- dummy-app-node-renderer-e2e-tests

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: justin808

.github/workflows/pro-integration-tests.yml

@@ -96,7 +96,8 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: 22
-          cache: yarn
+          # Disable cache for Node 22 due to V8 bug in 22.21.0
+          # https://github.com/nodejs/node/issues/56010
           cache-dependency-path: 'react_on_rails_pro/**/yarn.lock'
 
       - name: Print system information
@@ -192,7 +193,8 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: 22
-          cache: yarn
+          # Disable cache for Node 22 due to V8 bug in 22.21.0
+          # https://github.com/nodejs/node/issues/56010
           cache-dependency-path: 'react_on_rails_pro/**/yarn.lock'
 
       - name: Print system information
@@ -389,7 +391,8 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: 22
-          cache: yarn
+          # Disable cache for Node 22 due to V8 bug in 22.21.0
+          # https://github.com/nodejs/node/issues/56010
           cache-dependency-path: 'react_on_rails_pro/**/yarn.lock'
 
       - name: Print system information