fix: check for CSRF token in the raw body

[michalsn]

Description
CSRF check for PUT, PATCH, and DELETE type of requests is made only for JSON data. This PR fixes that by adding the raw input data to check.

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[MGatner]

Looks good pending Kenjis comments.

[michalsn]

I have no idea what the PHPStan error means because every occurrence of empty was removed from the file, even though I did not change that particular part of the code.

[paulbalandan]

@michalsn run vendor/bin/phpstan analyse --generate-baseline phpstan-baseline.php

[michalsn]

@paulbalandan Thanks!

[kenjis]

LGTM!