Improve panic messages when providing invalid buffer sizes to `ImageEncoder`s #1181

Job	Run time
test_avif	2m 54s
test_toolchains (1.61.0)	31s
test_other_archs (powerpc-unknown-linux-gnu, default)	3m 31s
test_toolchains (nightly)	1m 54s
test_features	39s
test_other_archs (powerpc-unknown-linux-gnu, webp-encoder)	2m 26s
test_toolchains (beta)	1m 25s
build_benchmarks	43s
test_features (default)	1m 28s
test_other_archs (i686-unknown-linux-gnu, default)	1m 40s
test_features (gif)	31s
test_other_archs (i686-unknown-linux-gnu, webp-encoder)	55s
test_features (jpeg)	25s
Fuzz targets (afl)	1m 21s
Fuzz targets (cargo-fuzz)	5m 45s
test_features (png)	29s
cargo-deny	19s
test_features (tiff)	28s
clippy	2m 16s
test_features (ico)	44s
public_private_dependencies	18s
test_features (pnm)	23s
test_features (tga)	38s
rustfmt	10s
test_avif_decoding	2m 14s
verify_msrv	2m 46s
test_features (webp)	28s
test_features (bmp)	36s
test_features (hdr)	26s
test_features (dxt)	26s
test_features (dds)	21s
test_features (farbfeld)	27s
test_features (openexr)	56s
test_features (jpeg_rayon)	40s
test_features (webp-encoder)	1m 0s
	42m 13s

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