ModuleInterface: Adopt swiftinterface verification lit substitutions in available-attr-no-collapse.swift. Also, put the input file contents directly in the test file instead of RUN: echo lines to make the test a bit easier to understand.

Author: tshortli

test/ModuleInterface/available-attr-no-collapse.swift

@@ -1,8 +1,8 @@
 // RUN: %empty-directory(%t)
-// RUN: echo '@available(macOS 12.0, iOS 15.0, macCatalyst 15.0, *)' > %t/Foo.swift
-// RUN: echo 'public struct Foo {}' >> %t/Foo.swift
-
-// RUN: %target-swift-frontend -emit-module -emit-module-interface-path %t/Foo.swiftinterface -enable-library-evolution %t/Foo.swift
+// RUN: %target-swift-emit-module-interface(%t/Foo.swiftinterface) %s
+// RUN: %target-swift-typecheck-module-from-interface(%t/Foo.swiftinterface)
 // RUN: %FileCheck %s < %t/Foo.swiftinterface
 
 // CHECK: macCatalyst
+@available(macOS 12.0, iOS 15.0, macCatalyst 15.0, *)
+public struct Foo {}