Autogenerate entire prime butterfly files, rather than just chunks #298

Job	Run time
Check+Test no features (stable)	37s
Check+Test no features (beta)	41s
Check+Test no features (nightly)	39s
Check and test Linux arm 64bit with neon (stable)	1m 58s
Check+Test default features (stable)	1m 28s
Check+Test no features (1.61)	1m 30s
Check and test Linux arm 64bit with neon (beta)	1m 52s
Check Autogenerated Code Match	20s
Check+Test default features (beta)	1m 28s
Check and test Linux arm 64bit with neon (nightly)	1m 50s
Check+Test default features (nightly)	1m 30s
Check and test Linux x86 32bit	1m 41s
Check and test Linux arm 64bit with neon (1.61)	2m 54s
Check+Test default features (1.61)	2m 29s
Rustfmt	12s
Check and test WebAssembly with SIMD (stable)	1m 17s
Check and test WebAssembly with SIMD (beta)	1m 19s
Check and test WebAssembly with SIMD (nightly)	1m 23s
Check and test WebAssembly with SIMD (1.61)	1m 51s
	26m 59s

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