[bazel] Remove the dependency on CodeGen from MCTargetDesc & Utils

This means llvm-mc should now build without depending on the target
CodeGen libraries.

Fix up a few includes in RISCV, AMDGPU, and X86 MCA to avoid transitive
deps on CodeGen.

Fixes #64166

Author: rnk

llvm/lib/Target/AMDGPU/MCA/AMDGPUCustomBehaviour.cpp

@@ -13,7 +13,7 @@
 
 #include "AMDGPUCustomBehaviour.h"
 #include "MCTargetDesc/AMDGPUMCTargetDesc.h"
-#include "SIInstrInfo.h"
+#include "Utils/AMDGPUBaseInfo.h"
 #include "TargetInfo/AMDGPUTargetInfo.h"
 #include "llvm/MC/TargetRegistry.h"
 #include "llvm/Support/WithColor.h"

llvm/lib/Target/RISCV/MCA/RISCVCustomBehaviour.cpp

@@ -14,7 +14,6 @@
 #include "RISCVCustomBehaviour.h"
 #include "MCTargetDesc/RISCVMCTargetDesc.h"
 #include "RISCV.h"
-#include "RISCVInstrInfo.h"
 #include "TargetInfo/RISCVTargetInfo.h"
 #include "llvm/MC/TargetRegistry.h"
 #include "llvm/Support/Debug.h"

llvm/lib/Target/X86/MCA/X86CustomBehaviour.cpp

@@ -13,7 +13,7 @@
 
 #include "X86CustomBehaviour.h"
 #include "TargetInfo/X86TargetInfo.h"
-#include "X86InstrInfo.h"
+#include "MCTargetDesc/X86BaseInfo.h"
 #include "llvm/MC/TargetRegistry.h"
 #include "llvm/Support/WithColor.h"
 

utils/bazel/llvm-project-overlay/llvm/BUILD.bazel

@@ -2271,9 +2271,6 @@ gentbl(
         strip_include_prefix = "lib/Target/" + target["name"],
         deps = [
             ":BinaryFormat",
-            # Depending on `:CodeGen` headers in this library is almost
-            # certainly a layering problem in numerous targets.
-            ":CodeGen",
             ":CodeGenTypes",
             ":DebugInfoCodeView",
             ":MC",