test: skip flaky test only the targeted OS

Signed-off-by: Jérôme Benoit <[email protected]>

Author: jerome-benoit

tests/pools/thread/dynamic.test.mjs

@@ -181,9 +181,10 @@ describe({
           WorkerChoiceStrategies,
         )
       ) {
-        // Interleaved weighted round robin strategy makes that test flaky on CI
+        // Interleaved weighted round robin strategy makes that test flaky on ubuntu-latest in the CI
         if (
           Deno.env.get('CI') != null &&
+          Deno.build.os === 'linux' &&
           workerChoiceStrategy ===
             WorkerChoiceStrategies.INTERLEAVED_WEIGHTED_ROUND_ROBIN
         ) {