[CI] Update GitHub workflows Node 22

[dackers86]

Issue

There are Github workflow that require upgrading from node20 to node22.

Acceptance Criteria

The following files contain node references that are updated to node22

• https://github.com/firebase/extensions/blob/next/.github/workflows/test.yml
• https://github.com/firebase/extensions/blob/next/.github/workflows/validate.yml

[andyma-star]

Created the PR here #2687