Add documentation for deprecated CMAC_CTX functions

Fixes #5539: Create a new manual page `CMAC_CTX.pod` documenting the deprecated `CMAC_CTX` functions and add the necessary build dependenc

Add documentation for deprecated CMAC_CTX functions

Fixes #5539: Create a new manual page `CMAC_CTX.pod` documenting the deprecated `CMAC_CTX` functions and add the necessary build dependencies. This page includes function descriptions, usage details, and replacement suggestions with the `EVP_MAC` interface.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/24814)

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