Test updates for D10 field edit form

Hi @rschwab.

It seems that your patch cannot be applied using the dev version of the module.

```
git apply -v --index 3442719-test-love.patch
Checking patch tests/src/Functional/EmptyValuesTest.php...
error: tests/src/Functional/EmptyValuesTest.php: does not match index
Checking patch tests/src/Functional/FileFieldSourcesTestBase.php...
error: tests/src/Functional/FileFieldSourcesTestBase.php: does not match index
Checking patch tests/src/Functional/MultipleValuesTest.php...
error: tests/src/Functional/MultipleValuesTest.php: does not match index
```

Not sure why.

I'm not sure why either. It works for me on a fresh pull:

me@local:~/repos/filefield9/web/modules$  git clone --branch '2.0.x' https://git.drupalcode.org/project/filefield_sources.git
Cloning into 'filefield_sources'...
remote: Enumerating objects: 1797, done.
remote: Counting objects: 100% (64/64), done.
remote: Compressing objects: 100% (45/45), done.
remote: Total 1797 (delta 16), reused 52 (delta 12), pack-reused 1733
Receiving objects: 100% (1797/1797), 376.69 KiB | 2.77 MiB/s, done.
Resolving deltas: 100% (1171/1171), done.
me@local:~/repos/filefield9/web/modules$ cd filefield_sources/
me@local:~/repos/filefield9/web/modules/filefield_sources$ git apply -v --index 3442719-test-love.patch
Checking patch tests/src/Functional/EmptyValuesTest.php...
Checking patch tests/src/Functional/FileFieldSourcesTestBase.php...
Checking patch tests/src/Functional/MultipleValuesTest.php...
Applied patch tests/src/Functional/EmptyValuesTest.php cleanly.
Applied patch tests/src/Functional/FileFieldSourcesTestBase.php cleanly.
Applied patch tests/src/Functional/MultipleValuesTest.php cleanly.

I create a merge request because the DrupalCi does not allow me to see the console output anymore, and it is hard to check why it is failing.

Here the pipeline, it seems that some tests are still failing, those are expected to fail or with your current patch all the tests should pass?
https://git.drupalcode.org/project/filefield_sources/-/jobs/1423706

David.

Yes these test failures are fixed elsewhere. Here's the links in error order:

1. 🐛 Fatal error when trying to use File browser RTBC
2. 🐛 Dont use curl, use the drupal client instead RTBC
3. 🐛 Dont use curl, use the drupal client instead RTBC
4. 🐛 Make sure $callback is_callable. ( TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "FileSizeLimit" not found or invalid function name ) Needs review
5. 🐛 Dont use curl, use the drupal client instead RTBC
6. 🐛 Dont use curl, use the drupal client instead RTBC

Automatically closed - issue fixed for 2 weeks with no activity.