Rename mbedtls_*_ret() cryptography functions whose deprecated variants
have been removed in #4029
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This change affects users who were using the `mbedtls_*_ret()` cryptography
functions.

Those functions were created based on now-deprecated functions according to a
requirement that a function needs to return a value. This change brings back the
original names of those functions.

To migrate to the this change the user can keep the `*_ret` names in their code
and include the `compat_2.x.h` header file which holds macros with proper
renaming or to rename those function in their code according to the list from
mentioned header file.