Drupal 10 compatibility for 8.x-1.x

The MR 191, when tested locally, passed all PHP Unit tests and all Upgrade Status tests with no deprecation warnings.

Noting that the "PHP 7.4 & MySQL 5.7, D10.1.4 Composer require failure" is expected since Drupal 10 requires PHP 8.1.

If it is necessary to install this fork via composer before it gets merged, edit composer.json, replacing:

    "repositories": [
        {
            "type": "composer",
            "url": "https://packages.drupal.org/8"
        }

with

    "repositories": [
        {
            "type": "composer",
            "url": "https://packages.drupal.org/8",
            "exclude": [
                "drupal/openid_connect"
            ]
        },
        {
            "type": "git",
            "url": "https://git.drupalcode.org/issue/openid_connect-3393666.git"
        }

Then require via composer:

composer require 'drupal/openid_connect:dev-3393666-drupal-10-compatibility' --with-all-dependencies

@mikegodin, THX for your help!

I asked one of the maintainers(sanduhrs) about this and w decided to bring back the deprecation annotations because these functions are not static in 2.x and 3.x.

I also moved the helper method from the tests to a trait so we don't need to duplicate it.

I manually tested these changes with a Drupal 10. And it seemed to work just fine!

Even though I made the last changes to the MR I set this to RTBC - my changes where purely cosmetic and coordinated with sanduhrs.

Merged, thanks!

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