Add and fix missing Triple tests (#6842)

Vendored Swift Driver triple was not checked against a few tests that weren't brought over from TSC after `TSC.Triple` type was deprecated. We should fix those tests, especially as they verified that per-component equality for triples worked instead of the current string-based equality check.

Also fixed some of the `Utilities/soundness.sh` script failures.

Related to rdar://113967401

Author: MaxDesiatov

Sources/Basics/Triple+Basics.swift

@@ -189,6 +189,7 @@ extension Triple {
         guard self != triple else {
             return true
         }
+
         if
             self.arch == triple.arch &&
             self.vendor == triple.vendor &&

Tests/BasicsTests/TripleTests.swift

@@ -170,19 +170,19 @@ final class TripleTests: XCTestCase {
         let linux = try? Triple("x86_64-unknown-linux-gnu")
         XCTAssertNotNil(linux)
         XCTAssertEqual(linux!.os, .linux)
-        XCTAssertNil(linux!.osVersion)
+        XCTAssertEqual(linux!.osVersion, Triple.Version.zero)
         XCTAssertEqual(linux!.environment, .gnu)
 
         let macos = try? Triple("x86_64-apple-macosx10.15")
         XCTAssertNotNil(macos!)
-        XCTAssertEqual(macos!.osVersion, .init(parse: "10.15")!)
+        XCTAssertEqual(macos!.osVersion, .init(parse: "10.15"))
         let newVersion = "10.12"
         let tripleString = macos!.tripleString(forPlatformVersion: newVersion)
         XCTAssertEqual(tripleString, "x86_64-apple-macosx10.12")
         let macosNoX = try? Triple("x86_64-apple-macos12.2")
         XCTAssertNotNil(macosNoX!)
         XCTAssertEqual(macosNoX!.os, .macosx)
-        XCTAssertEqual(macosNoX!.osVersion, .init(parse: "12.2")!)
+        XCTAssertEqual(macosNoX!.osVersion, .init(parse: "12.2"))
 
         let android = try? Triple("aarch64-unknown-linux-android24")
         XCTAssertNotNil(android)
@@ -220,11 +220,4 @@ final class TripleTests: XCTestCase {
         try XCTAssertFalse(Triple("x86_64-apple-macosx").isRuntimeCompatible(with: Triple("x86_64-apple-linux")))
         try XCTAssertTrue(Triple("x86_64-apple-macosx14.0").isRuntimeCompatible(with: Triple("x86_64-apple-macosx13.0")))
     }
-
-    func testIsRuntimeCompatibleWith() throws {
-        try XCTAssertTrue(Triple("x86_64-apple-macosx").isRuntimeCompatible(with: Triple("x86_64-apple-macosx")))
-        try XCTAssertTrue(Triple("x86_64-unknown-linux").isRuntimeCompatible(with: Triple("x86_64-unknown-linux")))
-        try XCTAssertFalse(Triple("x86_64-apple-macosx").isRuntimeCompatible(with: Triple("x86_64-apple-linux")))
-        try XCTAssertTrue(Triple("x86_64-apple-macosx14.0").isRuntimeCompatible(with: Triple("x86_64-apple-macosx13.0")))
-    }
 }