Fix class name and filename for case sensitive filesystems

[kdckrs]

Description (*)

Adds support for "SameSite" cookie property #1246 is throwing some errors on case-sensitive file systems. This PR fixes this.

Related Pull Requests

• Adds support for "SameSite" cookie property #1246

Fixed Issues (if relevant)

Fixes compatibility with case sensitive file systems see #1246

Manual testing scenarios (*)

In the backend, on General > Web, Magento's autoloader attempts to load Mage_Adminhtml_Model_System_Config_Source_Cookie_Samesite , while the class file is named "SameSite.php" (with an upper "Site" in it). The file is not auto-loaded on case sensitive filesystems, and causes wild errors.
(Taken from @ansgarbecker in the linked PR)

Questions or comments

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All automated tests passed successfully (all builds are green)

[kdckrs]

@Flyingmana something up with the Github Actions? Unit tests step failed on the "publish results" step:

github.GithubException.GithubException: 403 {"message": "Resource not accessible by integration", "documentation_url": "https://docs.github.com/rest/reference/checks#create-a-check-run"}

[ansgarbecker]

@kdckrs Could you retry merging? I'm not sure why that was neccessary but I guess with 59983f9 this should pass through now.

[kdckrs]

@kdckrs Could you retry merging? I'm not sure why that was neccessary but I guess with 59983f9 this should pass through now.

All good now ;)