Allow token to be used in attributes and classes for HTML elements

@bobbysaul thanks for the patch. Your patch adds and allows tokens to be used successfully and it's working well. I have checked it using Acquia Dev Desktop and attached screenshots.

New patch tokens_in_attributes-2961885-2.patch added to work better with Tokens in field group's css classes patches.

Retesting patch.

Fixed test case and coding standard.

I rerolled the #13 patch to be compatible with Drupal 9 and field_group version 8.x-3.2.

Review for #14.

1. The patch and the interdiff doesn't match to each other - patch doesn't have validateId()
2. Interdiff:

   +++ b/src/FieldGroupFormatterBase.php
   @@ -239,8 +239,7 @@
   -    $id = $form_state_values['fields'][$plugin_name]['settings_edit_form']['settings']['id'];
   -    if (!empty($id) && !preg_match('!^[A-Za-z0-9-_\[\]\:]+$!', $id)) {
   +    if (!empty($form_state_values['fields'][$plugin_name]['settings_edit_form']['settings']['id']) && !preg_match('!^[A-Za-z0-9-_]+$!', $form_state_values['fields'][$plugin_name]['settings_edit_form']['settings']['id'])) {
   

   reverts correct change from the previous patch for validateId().

RE #15 - I wasn't able to apply the patch with either composer-patches and manually with patch utility.

I re-rolled #14 fixing validation issue. Patch wasn't applying , had to fix conflicts manually , so no interdiff. This patch however is perfectly applicable to 3.2.

Tests are broken , see #3248782: Fix tests in HEAD.

Tested patch #16 on Drupal 9.4.5 and Field Group 8.x-3.2, seems to work perfectly.

I re-rolled the patch to be compatible with this issue
https://www.drupal.org/project/field_group/issues/2858336

I found the issue with token replacement when we use the link field token. It encodes to & instead of & for link so I have fixed it and attached the patch file. Please verify.

patch from #20 working here. thanks

Yes, #20 is working, thanks

Please use MR, not patches.

Created a merge request from patch #20 plus changing the clean up code to only allow alphanumeric, hyphens, underscores, and space for classes.

Also adding here the static patch just in-case someone modifies the MR and breaks the code.

The patch at the comment #20 work for me in version 8.x.3.4 since update to D 10.4, other version for this module not work a patch for me.
I'm waiting apply this patch, since update to Drupal 10. i could grantee it's work in Drupal 11.1.2 whit version 8.x.3.4. if merged to dev i will test quickly and i will send my feedback.