Fix an issue that cause compilation failure

LocalPackages/BuildToolPlugins/Plugins/InputFilesChecker/InputFilesChecker.swift

@@ -163,7 +163,10 @@ struct TargetSourcesChecker: BuildToolPlugin, XcodeBuildToolPlugin {
     }
 }
 
-extension File: @retroactive Equatable, @retroactive Hashable {
+// Explicitely use module name to silence warning for protocol conformance for protocols defined in an external library.
+// We run e2e tests on Xcode 15 so we can't use @retroactive keyword.
+// More info at https://github.com/swiftlang/swift-evolution/blob/main/proposals/0364-retroactive-conformance-warning.md
+extension File: Swift.Equatable, Swift.Hashable {
     public static func == (lhs: File, rhs: File) -> Bool {
         lhs.path == rhs.path && lhs.type == rhs.type
     }