[CMake] StringProcessing: Disable CMake compiler check (#80364)

The CMake compiler checks depend on StringProcessing being implemented.
The old build system may not have rebuilt the module, which will cause
the compiler check to fail. Disable the CMake compiler verification.

CMakeLists.txt

@@ -1662,6 +1662,7 @@ if(SWIFT_ENABLE_NEW_RUNTIME_BUILD)
         INSTALL_COMMAND "" # No install story set up yet
         CMAKE_ARGS
           -DBUILD_SHARED_LIBS=YES
+          -DCMAKE_Swift_COMPILER_WORKS:BOOLEAN=YES
           -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
           -DCMAKE_INSTALL_PREFIX:FILEPATH=${INSTALL_DIR}
           -DCMAKE_Swift_COMPILER:FILEPATH=$<IF:$<BOOL:${CMAKE_CROSSCOMPILING}>,${CMAKE_Swift_COMPILER},$<PATH:REPLACE_FILENAME,$<TARGET_FILE:swift-frontend>,swiftc>>