Remove nonisolated(unsafe) from macros definitions

Updated the macros variable in test files to remove the nonisolated(unsafe) attribute, making the declaration standard. This change improves code clarity and consistency across CodableKit, DecodableKit, and EncodableKit test suites.

Author: WendellXY

Tests/CodableKitTests/Defines.swift

@@ -14,7 +14,7 @@ import SwiftSyntaxMacrosGenericTestSupport
 import SwiftSyntaxMacrosTestSupport
 import Testing
 
-nonisolated(unsafe) let macros: [String: any Macro.Type] = [
+let macros: [String: any Macro.Type] = [
   "Codable": CodableMacro.self,
   "CodableKey": CodableKeyMacro.self,
   "DecodableKey": DecodableKeyMacro.self,

Tests/DecodableKitTests/Defines.swift

@@ -14,7 +14,7 @@ import SwiftSyntaxMacrosGenericTestSupport
 import SwiftSyntaxMacrosTestSupport
 import Testing
 
-nonisolated(unsafe) let macros: [String: any Macro.Type] = [
+let macros: [String: any Macro.Type] = [
   "Codable": CodableMacro.self,
   "CodableKey": CodableKeyMacro.self,
   "DecodableKey": DecodableKeyMacro.self,

Tests/EncodableKitTests/Defines.swift

@@ -14,7 +14,7 @@ import SwiftSyntaxMacrosGenericTestSupport
 import SwiftSyntaxMacrosTestSupport
 import Testing
 
-nonisolated(unsafe) let macros: [String: any Macro.Type] = [
+let macros: [String: any Macro.Type] = [
   "Codable": CodableMacro.self,
   "CodableKey": CodableKeyMacro.self,
   "DecodableKey": DecodableKeyMacro.self,