[test] Update ParseableInterface to ModuleInterface

Also remove uses of -emit-parseable-module-interface from tests

test/ModuleInterface/ModuleCache/Inputs/force-module-loading-mode/Lib.swiftinterface

@@ -0,0 +1,9 @@
+// swift-interface-format-version: 1.0
+// swift-module-flags: -parse-stdlib -module-name Lib
+
+public struct FromInterface {
+  @inlinable public init() {}
+}
+public var testValue: FromInterface {
+  @inlinable get { return FromInterface() }
+}