Fix test failure

Author: jmschonfeld

Tests/FoundationEssentialsTests/DataTests.swift

@@ -2473,13 +2473,16 @@ struct LargeDataTests {
     }
 
     @Test func validateMutation_cow_largeMutableBytes() {
+        // Avoid copying a large data on platforms with constrained memory limits
+        #if !canImport(Darwin) || os(macOS)
         var data = Data(count: largeCount)
         let heldData = data
         var bytes = data.mutableBytes
         bytes.storeBytes(of: 1, toByteOffset: 0, as: UInt8.self)
 
         #expect(data[0] == 1)
         #expect(heldData[0] == 0)
+        #endif
 
         var data2 = Data(count: largeCount)
         // Escape the pointer to compare after a mutation without dereferencing the pointer
@@ -2494,13 +2497,16 @@ struct LargeDataTests {
     }
 
     @Test func validateMutation_cow_largeMutableSpan() {
+        // Avoid copying a large data on platforms with constrained memory limits
+        #if !canImport(Darwin) || os(macOS)
         var data = Data(count: largeCount)
         let heldData = data
         var bytes = data.mutableSpan
         bytes[0] = 1
 
         #expect(data[0] == 1)
         #expect(heldData[0] == 0)
+        #endif
 
         var data2 = Data(count: largeCount)
         // Escape the pointer to compare after a mutation without dereferencing the pointer