Add support for Bearer token authentication with Cloudflare API

Hello,

Thank you for contributing the patch to the module! I’ve reviewed it and applied it to the codebase, and everything looks fine from my side. However, I’m unable to test it fully as I don’t currently have an account to verify the functionality.

If anyone in the community can test it and confirm that it’s working as expected, I’d be more than happy to approve the patch. Your feedback is greatly appreciated!

Best wishes,
Alaa

Tested & Works as Expected
I have tested https://git.drupalcode.org/project/cloudflare_purge/-/merge_requests/8#n....
Now the code for both Bearer token or API key.

Thank you @mohammad faqeh for testing.