Address PR comments, vendor swift-driver code

Author: rauhul

Package.swift

@@ -152,7 +152,6 @@ let package = Package(
                 .product(name: "DequeModule", package: "swift-collections"),
                 .product(name: "OrderedCollections", package: "swift-collections"),
                 .product(name: "SwiftToolsSupport-auto", package: "swift-tools-support-core"),
-                .product(name: "SwiftDriver", package: "swift-driver"),
                 .product(name: "SystemPackage", package: "swift-system"),
             ],
             exclude: ["CMakeLists.txt"]

Sources/Basics/Triple.swift renamed to Sources/Basics/Triple+BasicsAPI.swift

@@ -12,9 +12,6 @@
 
 import enum TSCBasic.JSON
 import class TSCBasic.Process
-import struct SwiftDriver.Triple
-
-public typealias Triple = SwiftDriver.Triple
 
 extension Triple {
     public init(_ description: String) throws {