Bynder configuration form validating wrong formats

Removed validation for Bynder domain names and for token character length as they are not fixed formats.

1. +++ b/src/Form/BynderConfigurationForm.php
   @@ -414,13 +414,6 @@ class BynderConfigurationForm extends ConfigFormBase {
   -    foreach (['consumer_secret', 'token_secret'] as $name) {
   -      if (strlen(trim($credentials[$name])) !== 32 || !ctype_alnum(trim($credentials[$name]))) {
   -        $form_state->setError($form[$name], $this->t('@label needs to be 32 characters long and contain only letters and numbers.', [
   -          '@label' => $form[$name]['#title']->render(),
   -        ]));
   -      }
   -    }
    
   

   Shouldn't we leave this check and just allow longer strings?

2. +++ b/src/Form/BynderConfigurationForm.php
   @@ -440,10 +433,6 @@ class BynderConfigurationForm extends ConfigFormBase {
   -    if (!(substr(trim($credentials['account_domain']), 0, 8) === 'https://') || !(substr(trim($credentials['account_domain']), -15) === '.getbynder.com/')) {
   -      $form_state->setError($form['account_domain'], $this->t('Account domain expect a value in the format ":url".', [':url' => 'https://some-name.getbynder.com/']));
   -    }
   -
   

   I think that we should still check if the provided string is a valid domain.

Patch in #6 is missing the description change from #2. I think that we'll also need to update \Drupal\Tests\bynder\FunctionalJavascript\ConfigurationFormTest.

Re-uploading the patch. Hoping that tesbot will grab it.

Let's see if this fixes the tests.

Committed.