Emit swiftinterface files for backward compat (#626)

Author: Reflejo

.bazelrc

@@ -23,8 +23,6 @@ build --features=swift.remap_xcode_path
 build --features=swift.use_global_module_cache
 build --features=swift.enable_library_evolution
 
-build:ios-hello-world --features=swift.emit_swiftinterface
-
 # Gate the references to androidndk behind a flag to support building on arm linux.
 build:android --android_crosstool_top=@androidndk//:toolchain
 
@@ -92,6 +90,7 @@ build:force-xcode-version --ios_simulator_device="iPhone 15"
 build:force-xcode-version --ios_simulator_version=18.2
 build:force-xcode-version --xcode_version=16.2
 build:release-ios --config=release-common --config=force-xcode-version
+build:release-ios --features=swift.emit_swiftinterface
 
 # Allows disabling the cache for cases where the cache might be slow, e.g. slow networks.
 build:nocache --remote_accept_cached=false