[cxx-interop] Make safe interop wrapper accessible in production compilers

Explanation: The experimental feature flag was not available for production
compilers. There is no reason for that.
Issue: rdar://148961491
Risk: Low, no functional changes other than making the flag available.
Original PR: #80713
Reviewer:

Author: Gabor Horvath

include/swift/Basic/Features.def

@@ -457,7 +457,7 @@ EXPERIMENTAL_FEATURE(TrailingComma, false)
 
 // Import bounds safety and lifetime attributes from interop headers to
 // generate Swift wrappers with safe pointer types.
-EXPERIMENTAL_FEATURE(SafeInteropWrappers, false)
+EXPERIMENTAL_FEATURE(SafeInteropWrappers, true)
 
 /// Ignore resilience errors due to C++ types.
 EXPERIMENTAL_FEATURE(AssumeResilientCxxTypes, true)