fix: Redis cache handler deleteMatching() not working when a prefix is being used

[TeamTizo]

deleteMatching wasn't working for Redis cache when a prefix was being used. adding prefix here fixed the issue.

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

[kenjis]

Thank you for sending this PR!

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See https://github.com/codeigniter4/CodeIgniter4/blob/develop/contributing/pull_request.md

[kenjis]

If you send a PR, you must add test code for it.
See https://github.com/codeigniter4/CodeIgniter4/blob/develop/contributing/pull_request.md#unit-testing

This PR will not be merged because there is no test code.
Next time you submit a PR, be sure to include the test code.
Thank you.

[kenjis]

Closed by #8952