test: use test fixtures from the unity test framework

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[github-actions]

Running: benchmark BenchmarkDeflateInflateTextFile with Debug build on posix

Deflate_zlib_SmallTextFile,time,4294967295,1106087,0.000258
Deflate_zlib_SmallTextFile,time,4294967295,1223332,0.000285
Inflate_zlib_SmallTextFile,time,4294967295,388231,0.000090
Inflate_zlib_SmallTextFile,time,4294967295,398345,0.000093

Running: benchmark BenchmarkDeflateInflateTextFile with Release build on posix

Deflate_zlib_SmallTextFile,time,4294967295,848090,0.000197
Deflate_zlib_SmallTextFile,time,4294967295,868244,0.000202
Inflate_zlib_SmallTextFile,time,4294967295,306106,0.000071
Inflate_zlib_SmallTextFile,time,4294967295,325195,0.000076

[github-actions]

Running: benchmark BenchmarkDeflateInflateTextFile with Debug build on nt

Deflate_zlib_SmallTextFile,time,4294967295,1705900,0.000397
Deflate_zlib_SmallTextFile,time,4294967295,1905900,0.000444
Inflate_zlib_SmallTextFile,time,4294967295,577300,0.000134
Inflate_zlib_SmallTextFile,time,4294967295,620400,0.000144

Running: benchmark BenchmarkDeflateInflateTextFile with Release build on nt

Deflate_zlib_SmallTextFile,time,4294967295,1750800,0.000408
Deflate_zlib_SmallTextFile,time,4294967295,1860600,0.000433
Inflate_zlib_SmallTextFile,time,4294967295,316200,0.000074
Inflate_zlib_SmallTextFile,time,4294967295,379600,0.000088