fix(cmake): remove redundant add_definitions(${LLVM_DEFINITIONS})

[FIM43-Redeye]

Summary

• Remove redundant add_definitions(${LLVM_DEFINITIONS}) from all six CMakeLists.txt files that also include(HandleLLVMOptions)
• HandleLLVMOptions already adds every flag individually via add_compile_definitions(), making these calls purely duplicative
• The redundant calls caused garbled -D flags with GCC because LLVM_DEFINITIONS is a space-separated string, not a CMake list

Fixes #2965.

Test plan

• Verified target_model, target_model_rtti, and register_database CppTests build and pass with Clang after removal
• CI: GCC compile matrix should now pass cleanly

Generated using Claude Code.

[Copilot]

Pull request overview

This PR removes redundant add_definitions(${LLVM_DEFINITIONS}) calls from CMake subprojects that already include(HandleLLVMOptions), avoiding duplicated/garbled -D definitions that break GCC builds (issue #2965).

Changes:

• Removed add_definitions(${LLVM_DEFINITIONS}) from six CMakeLists.txt files that already include HandleLLVMOptions.
• Ensures LLVM compile definitions are applied only via LLVM’s CMake machinery, preventing malformed preprocessor definitions with GCC.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
CMakeLists.txt	Drops redundant LLVM compile definitions in the top-level build configuration.
test/CMakeLists.txt	Drops redundant LLVM compile definitions for test configuration (affects CppTests build).
utils/mlir_aie_wheels/python_bindings/CMakeLists.txt	Drops redundant LLVM compile definitions for wheel/python bindings build.
programming_guide/CMakeLists.txt	Drops redundant LLVM compile definitions for programming guide build/tests.
programming_examples/CMakeLists.txt	Drops redundant LLVM compile definitions for examples build/tests.
mlir_exercises/CMakeLists.txt	Drops redundant LLVM compile definitions for exercises build/tests.

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[FIM43-Redeye]

CI checks out,but the queue bot kicked it out on Apr 14. Still seems okay, though. Anything else to take care of before merge?