[test] Mark kraken/audio SLOW only on TSAN

Marked as SLOW in
https://chromium-review.googlesource.com/c/v8/v8/+/2993538. We can be
more specific and not mark it for everything.

Bug: v8:7790, v8:11600, v8:11906
Change-Id: I1c238bffb9973ae80a2fcc32f4103215bd019d67
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2992719Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75483}

test/benchmarks/benchmarks.status

@@ -49,9 +49,6 @@
 ['variant in [jitless, nooptimization, stress]', {
   # Slow tests.
   'kraken/ai-astar': [PASS, SLOW],
-  'kraken/audio-dft': [PASS, SLOW],
-  'kraken/audio-fft': [PASS, SLOW],
-  'kraken/audio-oscillator': [PASS, SLOW],
   'kraken/imaging-darkroom': [PASS, SLOW],
   'kraken/imaging-desaturate': [PASS, SLOW],
   'octane/code-load': [PASS, SLOW],
@@ -117,6 +114,9 @@
 ['tsan', {
   # Slow tests.
   'kraken/audio-beat-detection': [SLOW],
+  'kraken/audio-dft': [SLOW],
+  'kraken/audio-fft': [SLOW],
+  'kraken/audio-oscillator': [SLOW],
 }],  # 'tsan'
 
 ]