tests: Add visual/define_bits_jpeg2 test

tests/tests/swfs/visual/define_bits_jpeg2/README.md

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+This test verifies various images embedded into a SWF.
+If you need to add more images, it's better to copy this test than to extend it.
+
+List of images:
+
+* `01_image.gif` – standard GIF,
+* `02_image_i.gif` – GIF with interlacing,
+* `03_image_420.jpeg` – JPEG with 4:2:0 chroma subsampling,
+* `04_image_422.jpeg` – JPEG with 4:2:2 chroma subsampling,
+* `05_image_440.jpeg` – JPEG with 4:4:0 chroma subsampling,
+* `06_image_444.jpeg` – JPEG with 4:4:4 chroma subsampling,
+* `07_image_ac.jpeg` – JPEG with arithmetic coding,
+* `08_image_cmyk.jpeg` – JPEG with CMYK color coding,
+* `09_image_fi.jpeg` – JPEG with Fast Integer DCT,
+* `10_image_fp.jpeg` – JPEG with Floating-Point DCT,
+* `11_image_low_quality.jpeg` – JPEG with low quality,
+* `12_image_meta.jpeg` – JPEG with additional metadata,
+* `13_image_np.jpeg` – non-progressive JPEG,
+* `14_image_rm8.jpeg` – JPEG with restart markers, 8 MCU rows,
+* `15_image_rm16.jpeg` – JPEG with restart markers, 16 MCU rows,
+* `16_image_rm32.jpeg` – JPEG with restart markers, 32 MCU rows,
+* `17_image_8gray.png` – 8-bit gray PNG,
+* `18_image_8graya.png` – 8-bit gray PNG with alpha,
+* `19_image_8rgb.png` – 8-bit RGB PNG,
+* `20_image_8rgba.png` – 8-bit RGB PNG with alpha,
+* `21_image_16gray.png` – 16-bit gray PNG,
+* `22_image_16graya.png` – 16-bit gray PNG with alpha,
+* `23_image_16rgb.png` – 16-bit RGB PNG,
+* `24_image_16rgba.png` – 16-bit RGB PNG with alpha,
+* `25_image_adam7.png` – PNG with interlacing,
+* `26_image_c0.png` – PNG with compression level 0,
+* `27_image_c5.png` – PNG with compression level 5,
+* `28_image_c9.png` – PNG with compression level 9,
+* `29_image_meta.png` – PNG with additional metadata.
+
+Images are embedded sequentially.

tests/tests/swfs/visual/define_bits_jpeg2/test.toml

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+num_ticks = 1
+
+# FIXME We're badly decoding JPEG images with 4:2:0 and 4:4:0 chroma subsampling
+
+[[image_comparisons.output.checks]]
+tolerance = 0
+max_outliers = 1500
+
+[[image_comparisons.output.checks]]
+tolerance = 24
+max_outliers = 50
+
+[[image_comparisons.output.checks]]
+tolerance = 64
+max_outliers = 0
+
+[player_options]
+with_renderer = { optional = false, sample_count = 4 }