[K/N] Mute stress_gc_allocations on mingw_x64 ^KT-54727

Merge-request: KT-MR-7528
Merged-by: Alexander Shabalin <Alexander.Shabalin@jetbrains.com>

kotlin-native/backend.native/tests/build.gradle

@@ -3435,7 +3435,8 @@ standaloneTest("stress_gc_allocations") {
         (project.testTarget != "watchos_x64") &&
         (project.testTarget != "watchos_simulator_arm64") &&
         !isNoopGC &&
-        !isAggressiveGC // TODO: Investigate why too slow
+        !isAggressiveGC && // TODO: Investigate why too slow
+        (project.testTarget != "mingw_x64") // TODO: Fix on mingw.
     source = "runtime/memory/stress_gc_allocations.kt"
     flags = ['-tr', '-opt-in=kotlin.native.internal.InternalForKotlinNative']
 }