[Frontend] Switch -interface-compiler-version to Version

`SWIFT_COMPILER_VERSION` has more than 4 components and it's
easier to use `Version` API over `VersionTuple` as well.

lib/Serialization/ModuleFile.cpp

@@ -1416,6 +1416,6 @@ StringRef SerializedASTFile::getPublicModuleName() const {
   return File.getPublicModuleName();
 }
 
-llvm::VersionTuple SerializedASTFile::getSwiftInterfaceCompilerVersion() const {
+version::Version SerializedASTFile::getSwiftInterfaceCompilerVersion() const {
   return File.getSwiftInterfaceCompilerVersion();
 }