[aot] Fix missing .so in manylinux2014 environment

[Routhleck]

Issue: # In manylinux2014 environments, cmake can't find libtaichi_c_api.so. since the path in manylinux2014 is wrong.

Brief Summary

🤖 Generated by Copilot at e75061d

Improve the portability of the CMake configuration for the taichi C API. Use a variable to handle different library directory names on Linux.

Walkthrough

🤖 Generated by Copilot at e75061d

• Add a conditional check to find the shared library file for the taichi C API in either lib or lib64 directory (link)
• Use the TAICHI_SO_LOCATION variable to set the imported location and the check file list for the taichi_c_api target (link)

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[Routhleck]

@jim19930609