The CPU backend fails to handle the tt.get_program_id operation in the vector addition kernel

[SwapnilGhanshyala]

Bug Report: Error in Running tutorials/01-vector-add.py with TRITON_CPU_BACKEND

Command

TRITON_CPU_BACKEND=1 python tutorials/01-vector-add.py


```loc("01-vector-add.py":37:24): error: failed to legalize operation 'tt.get_program_id' that was explicitly marked illegal
Traceback (most recent call last):
  File "01-vector-add.py", line 87, in <module>
    output_triton = add(x, y)
  File "01-vector-add.py", line 73, in add
    add_kernel[grid](x, y, output, n_elements, BLOCK_SIZE=1024)
  File "triton/runtime/jit.py", line 209, in <lambda>
    return lambda *args, **kwargs: self.run(grid=grid, warmup=False, *args, **kwargs)
  File "triton/runtime/jit.py", line 526, in run
    kernel = self.compile(
  File "triton/compiler/compiler.py", line 278, in compile
    next_module = compile_ir(module, metadata)
  File "triton/backends/cpu/compiler.py", line 151, in <lambda>
    stages["llir"] = lambda src, metadata: self.make_llir(src, metadata, options)
  File "triton/backends/cpu/compiler.py", line 112, in make_llir
    pm.run(mod)
RuntimeError: PassManager::run failed

Steps
python -m venv .venv
source .venv/bin/activate
pip install ninja cmake wheel

TRITON_BUILD_WITH_CLANG_LLD=true TRITON_BUILD_WITH_CCACHE=true TRITON_CPU_BACKEND=1 pip install --no-build-isolation -e './python[tutorials]'