Use a file group for the input test wav files.

PiperOrigin-RevId: 657194349

iamf/cli/testdata/BUILD

@@ -1,31 +1,9 @@
 package(default_visibility = ["//iamf/cli:__subpackages__"])
 
-exports_files([
-    "sample1_48kHz_stereo.wav",
-    "sawtooth_100_stereo.wav",
-    "sawtooth_10000_foa_48khz.wav",
-    "sawtooth_10000_stereo_48khz.wav",
-    "sawtooth_10000_stereo_44100hz_s16le.wav",
-    "sawtooth_10000_stereo_48khz_s24le.wav",
-    "stereo_8_samples_48khz_s16le.wav",
-    "stereo_8_samples_48khz_s24le.wav",
-    "sawtooth_8000_toa_48khz.wav",
-    "Mechanism_5s.wav",
-    "Mechanism_5s_32bit.wav",
-    "Transport_TOA_5s.wav",
-    "audiolab-acoustic-guitar_2OA_470_ALLRAD_concat.wav",
-    "audiolab-acoustic-guitar_2OA_470_ALLRAD_0.5s.wav",
-    "audiolab-acoustic-guitar_2OA_470_ALLRAD_5s.wav",
-    "sine_1000_48khz.wav",
-    "sine_1000_48khz_512ms.wav",
-    "sine_1000_16khz_512ms.wav",
-    "sine_1000_16khz_512ms_s32le.wav",
-    "dialog_clip_stereo.wav",
-] + glob(
-    [
-        "test_*.textproto",
-    ],
-))
+filegroup(
+    name = "input_wav_files",
+    srcs = glob(["*.wav"]),
+)
 
 filegroup(
     name = "test_vectors",