Merge pull request swiftlang#75173 from swiftlang/egorzhdan/cxx-interop-cmake-option-default

[cxx-interop] Flip the default value of `SWIFT_ENABLE_EXPERIMENTAL_CXX_INTEROP`

Author: egorzhdan

CMakeLists.txt

@@ -682,7 +682,7 @@ option(SWIFT_ENABLE_EXPERIMENTAL_CONCURRENCY
 
 option(SWIFT_ENABLE_EXPERIMENTAL_CXX_INTEROP
   "Enable experimental C++ interop modules"
-  FALSE)
+  TRUE)
 
 option(SWIFT_ENABLE_CXX_INTEROP_SWIFT_BRIDGING_HEADER
   "Install the <swift/bridging> C++ interoperability header alongside compiler"