Adds an option to disable the IR interpreter

By default we won't build with the interpeter to reduce user confusion.
The interpreter isn't really useful to end users so remove it.

Completely removes it from building except for the fallback operations.

This also removes the selection from FEXConfig to remove selection
confusion there.

File Stats:
FEXLoader Size with Interpreter:    3422768 bytes
FEXLoader Size without Interpreter: 3301944 bytes
Size difference:                    96.4699915%
Bytes removed:                      120824 bytes
4k pages removed:                   29.498046875 -> 30 rounded up

VM Stats (Reported from bloaty):
Memory Size with Interpreter:    6.50Mi
Memory Size without Interpreter: 6.38Mi
Size difference:                 98.1538462%

.github/workflows/ccpp.yml

@@ -51,7 +51,7 @@ jobs:
       # Note the current convention is to use the -S and -B options here to specify source
       # and build directories, but this is only available with CMake 3.13 and higher.
       # The CMake binaries on the Github Actions machines are (as of this writing) 3.12
-      run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE -G Ninja -DENABLE_LTO=False -DENABLE_ASSERTIONS=True -DENABLE_X86_HOST_DEBUG=True
+      run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE -G Ninja -DENABLE_LTO=False -DENABLE_ASSERTIONS=True -DENABLE_X86_HOST_DEBUG=True -DENABLE_INTERPRETER=True
 
     - name: Build
       working-directory: ${{runner.workspace}}/build