examples/stacks/drupal: fix for local

[gcurtis]

Fix the drupal example so that it runs locally. It's still broken in CI due to some filesystem permissions issues that I don't have time to debug. The example had a few errors, some probably due to the example drifting too far from the most recent Devbox version.

• Add curl to devbox.json so that run_test works.
• Increase the sleep duration (2 seconds wasn't long enough on my M1).
• Symlink devbox.d/web -> ../web so that nginx serves the drupal site instead of a static index.html.
• Update the curl command to hit localhost:8081, which is what nginx is listening on.
• Set MYSQL_UNIX_PORT via the env field in devbox.json. I think otherwise the plugin overrides it back to its default value.
• Update some composer dependencies to address dependabot security issues.

[Lagoja]

Drupal Test is still failing in CI with the following:

2024-02-09T19:56:14.2244712Z         chown: changing ownership of '$WORK/.devbox/virtenv/mariadb/data': Operation not permitted
2024-02-09T19:56:14.2246280Z         Error: error running script "run_test" in Devbox: exit status 1
2024-02-09T19:56:14.2247035Z         
2024-02-09T19:56:14.2247445Z         [exit status 1]
2024-02-09T19:56:14.2248691Z         FAIL: /tmp/TestExamples3040603473/026/stacks_drupal_run_test.test.txt:2: unexpected command failure

[gcurtis]

I put back the skip for the test in CI. It runs locally, but I don't have time to figure out the filesystem permissions issues that are going on in CI.