Add missing @test macros

Motivation:

The new tests should be run

Modifications:

The new tests are missing the @test macros

Result:

The new tests will have the @test macros

Author: Juice805

Tests/X509Tests/CustomPrivateKeyTests.swift

@@ -32,6 +32,7 @@ final class CustomPrivateKeyTests {
         #expect(keyBacking.supportedSignatureAlgorithms == privateKey.supportedSignatureAlgorithms)
     }
 
+    @Test("CustomPrivateKey Signing")
     func testCustomPrivateKeySigning() async throws {
         let privateKey = Certificate.PrivateKey(TestAsyncKey())
 
@@ -47,13 +48,15 @@ final class CustomPrivateKeyTests {
         }
     }
 
+    @Test("CustomPrivateKey Equatable")
     func testCustomPrivateKeyBackingEquality() {
         let keyBacking = TestAsyncKey()
         let leftKey = Certificate.PrivateKey(keyBacking)
         let rightKey = Certificate.PrivateKey(keyBacking)
         #expect(leftKey == rightKey)
     }
 
+    @Test("CustomPrivateKey Serialization")
     func testCustomPrivateKeySerialization() {
         let privateKey = Certificate.PrivateKey(TestAsyncKey())
         #expect(throws: TestAsyncKey.MyError.self) {