Revert "test: mark test-webcrypto-encrypt-decrypt-aes flaky"

This reverts commit 3d21792.

PR-URL: #35666
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

test/parallel/parallel.status

@@ -27,7 +27,6 @@ test-worker-memory: PASS,FLAKY
 test-worker-message-port-transfer-terminate: PASS,FLAKY
 
 [$system==linux]
-test-webcrypto-encrypt-decrypt-aes: PASS,FLAKY
 
 [$system==macos]