[cmake] Target AXV2 ISA when building for AMD64 (#23)

* [cmake] Target AXV2 ISA when building for AMD64

Targeting AXV2 is the closest we can get to targeting
Haswell when compiling with msvc. See DEVIN-1142 for
more context.

* Make changes in bcny-firebase.yml instead of CMakeLists.txt

---------

Co-authored-by: kendal <[email protected]>

Author: kendalharland

.github/workflows/bcny-firebase.yml

@@ -76,8 +76,8 @@ jobs:
                 -D FIREBASE_INCLUDE_FIRESTORE=YES `
                 -D FIREBASE_USE_BORINGSSL=YES `
                 -D MSVC_RUNTIME_LIBRARY_STATIC=NO `
-                -D CMAKE_C_FLAGS="/D_HAS_EXCEPTIONS=0 /EHsc-"`
-                -D CMAKE_CXX_FLAGS="/D_HAS_EXCEPTIONS=0 /EHsc-" `
+                -D CMAKE_C_FLAGS="/D_HAS_EXCEPTIONS=0 /EHsc- /arch:AVX2"`
+                -D CMAKE_CXX_FLAGS="/D_HAS_EXCEPTIONS=0 /EHsc- /arch:AVX2" `
                 -D CMAKE_MSVC_DEBUG_INFORMATION_FORMAT=Embedded `
                 -D FIREBASE_PYTHON_HOST_EXECUTABLE:FILEPATH=${{ steps.python.outputs.python-path }} `
                 -D FLATBUFFERS_FLATC_EXECUTABLE=${{ github.workspace }}/BinaryCache/flatbuffers/Release/flatc.exe