Change build tests to install Standard profile

Looks good!

Self-crediting because this implemented the solution I suggested in #3365463-8: [DrupalCon] Automatic Updates alpha test result → . 😅

Actually…

    // Uninstall Automated Cron, which is not supported by Automatic Updates.
    // Also uninstall Big Pipe, since it may cause page elements to be rendered
    // in the background and replaced with JavaScript, which isn't supported in
    // build tests.
    // @see \Drupal\automatic_updates\Validator\AutomatedCronDisabledValidator
    $page = $this->getMink()->getSession()->getPage();
    $this->visit('/admin/modules/uninstall');
    $page->checkField("uninstall[automated_cron]");
    $page->checkField('uninstall[big_pipe]');
    $page->pressButton('Uninstall');
    $page->pressButton('Uninstall');

… this means that the problem that #3365463 reported still would not be caught 😅

Is that what this bit in the issue summary meant?

[…] We might not have caught this anyways because The actual code would not have changed but we can improve our test coverage by installing standard for our build tests

It'd have been good to call that out explicitly on this issue then, because it's currently kinda misleading, since BEFORE that, the issue summary says

Ran into a problem with Big Pipe in testing 🐛 [DrupalCon] Automatic Updates alpha test result Needs work . […]

P.S.: Also why press that "Uninstall" button twice? 🤔

… this means that the problem that #3365463 reported still would not be caught

Yeah. We're gonna need a separate issue for that, with a dedicated functional JS test in some way.

Also why press that "Uninstall" button twice?

Once on the main uninstall form, and again to confirm the action (there's a confirm form for uninstalls). I guess I shoulda put a comment there.