Integrate ccache for faster compilation

[randgun]

Add support for ccache in the build process
Accelarate compile time of ascendc kernels from 430s to 50s.

[gemini-code-assist]

Summary of Changes

Hello @randgun, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the project's build process by integrating ccache into the CMake configuration. The change aims to significantly reduce build times for developers by caching compilation results. It intelligently checks for ccache's availability and configures the C and C++ compilers to utilize it, ensuring that the build system benefits from faster incremental builds when ccache is present.

Highlights

• ccache Integration: The build system now supports ccache to accelerate compilation times for C and C++ sources.
• Automatic Detection: The CMake configuration automatically detects the presence of ccache on the system.
• Conditional Application: If ccache is found, it is set as the compiler launcher; otherwise, compilation proceeds normally without ccache.

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[gemini-code-assist]

Code Review

This pull request integrates ccache to speed up compilation by setting CMAKE_C_COMPILER_LAUNCHER and CMAKE_CXX_COMPILER_LAUNCHER if ccache is found. The implementation is functionally correct. My feedback focuses on improving the implementation by using standard CMake features for better maintainability and adding configurability for more flexibility.