[OSLog] Update compiler stubs and tests

The compiler stubs for testing the OSLog implementation are in need of an update. This change updates the stubs to be consistent with the current OSLog implementation, updates the existing tests, and adds new tests for String and metatype interpolations.

rdar://69719729

Author: Josh Learn

stdlib/private/OSLog/CMakeLists.txt

@@ -10,6 +10,9 @@ add_swift_target_library(swiftOSLogTestHelper
   OSLogStringTypes.swift
   OSLogNSObjectType.swift
   OSLogFloatingPointTypes.swift
+  OSLogSwiftProtocols.swift
+  OSLogPrivacy.swift
+  OSLogFloatFormatting.swift
 
   SWIFT_MODULE_DEPENDS_IOS Darwin ObjectiveC
   SWIFT_MODULE_DEPENDS_OSX Darwin ObjectiveC