Default initialized test cases will use Swift Testing rather than XCTest

[marcprux]

Previously a new Skip project would have a sample test created using XCTest. With the advent of support for Swift Testing inhttps://github.com//pull/212, the test case will now be created with Testing, like so:

import Testing
import OSLog
import Foundation
@testable import SomeModule

let logger: Logger = Logger(subsystem: "SomeModule", category: "Tests")

@Suite struct SomeModuleTests {
    init() {
        #if SKIP
        // needed to load the compiled bridge from the transpiled tests
        loadPeerLibrary(packageName: "some-model", moduleName: "SomeModule")
        #endif
    }

    @Test func someModule() throws {
        logger.log("running testSomeModule")
        #expect(1 + 2 == 3, "basic test")
    }

    @Test func asyncThrowsFunction() async throws {
        let id = UUID()
        let type: SomeModuleModule.SomeModuleType = try await SomeModuleModule.createSomeModuleType(id: id, delay: 0.001)
        #expect(type.id == id)
    }

}