Disable transformersjs-whisper-wasm by default.

Whisper is a much more diverse workload in comparison to Bert but has some
notable downsides. In particular, the model is much bigger and its
overall memory footprint is much higher. This causes memory issues
on iOS and seems to be related to a relatively high jetsam rate there.

Whisper also takes much longer to run than Bert. So getting rid of
the longer workload speeds up the benchmark overall.

Author: kmiller68

JetStreamDriver.js

@@ -2542,7 +2542,7 @@ let BENCHMARKS = [
         iterations: 5,
         worstCaseCount: 1,
         allowUtf16: true,
-        tags: ["default", "Wasm", "transformersjs"],
+        tags: ["Wasm", "transformersjs"],
     }),
     new WasmLegacyBenchmark({
         name: "tfjs-wasm",