make/cmake: LLAMA_NO_CCACHE -> GGML_NO_CCACHE

[JohannesGaessler]

Fixes #8380 .

I think the easiest solution to resolve the discrepancy between LLAMA_CCACHE and GGML_CCACHE is to simply rename the option.

[ggerganov]

Add deprecation warnings:

# cmake
llama_option_depr(WARNING LLAMA_NO_CCACHE GGML_NO_CCACHE)

# make
ifdef LLAMA_NO_CCACHE
GGML_NO_CCACHE := 1
DEPRECATE_WARNING := 1
endif

[JohannesGaessler]

The deprecation warning for CMake would be misleading - the LLAMA_CCACHE option would be completely removed by this PR, otherwise the value of GGML_CCACHE will always be overridden. And also the deprecation warning code only prints a warning when an option is set to ON, rather than OFF. However, even without any further changes CMake will print the following:

CMake Warning:
  Manually-specified variables were not used by the project:

    LLAMA_CCACHE

Do you think that would be enough?

[ggerganov]

Yes, that should be enough 👍