amd64: Add SHANI implementation

[pjbgf]

The native non-SIMD implementation provides minor improvement when compared to the Go version. Given that SHANI is widely available these days, that version is being removed to decrease codebase complexity.

This implementation is roughly 30% faster:

goos: linux
goarch: amd64
pkg: github.com/pjbgf/sha1cd/test
cpu: AMD Ryzen 7 PRO 8840HS w/ Radeon 780M Graphics
                                    │     /tmp/before      │                   /tmp/after                   │
                                    │        sec/op        │        sec/op         vs base                  │
CalculateDvMask/generic-16            0.0000002000n ± 100%
CalculateDvMask/native-16             0.0000001500n ± 167%
CalculateDvMask/cgo-16                0.0000005500n ± 100%   0.0000004500n ±  56%        ~ (p=0.586 n=10)
Hash8Bytes/sha1-16                           102.5n ±   1%          100.8n ±   3%        ~ (p=0.085 n=10)
Hash8Bytes/sha1cd_native-16                  172.7n ±   1%          122.3n ±   1%  -29.15% (p=0.000 n=10)
Hash8Bytes/sha1cd_generic-16                 206.3n ±   1%          209.0n ±   2%   +1.28% (p=0.008 n=10)
Hash8Bytes/sha1cd_cgo-16                     709.0n ±   2%          712.4n ±   1%        ~ (p=0.971 n=10)
Hash320Bytes/sha1-16                         394.9n ±   1%          399.2n ±   1%   +1.08% (p=0.034 n=10)
Hash320Bytes/sha1cd_native-16                888.7n ±   2%          563.1n ±   3%  -36.63% (p=0.000 n=10)
Hash320Bytes/sha1cd_generic-16               1.096µ ±   1%          1.065µ ±   3%   -2.83% (p=0.003 n=10)
Hash320Bytes/sha1cd_cgo-16                   1.261µ ±   2%          1.269µ ±   1%        ~ (p=0.353 n=10)
Hash1K/sha1-16                               792.9n ±   1%          798.9n ±   2%   +0.76% (p=0.007 n=10)
Hash1K/sha1cd_native-16                      2.245µ ±   3%          1.523µ ±   1%  -32.18% (p=0.000 n=10)
Hash1K/sha1cd_generic-16                     2.979µ ±   1%          2.946µ ±   2%        ~ (p=0.190 n=10)
Hash1K/sha1cd_cgo-16                         2.284µ ±   3%          2.357µ ±   2%   +3.24% (p=0.002 n=10)
Hash8K/sha1-16                               5.090µ ±   2%          5.080µ ±   1%        ~ (p=0.897 n=10)
Hash8K/sha1cd_native-16                      17.09µ ±   2%          11.43µ ±   2%  -33.09% (p=0.000 n=10)
Hash8K/sha1cd_generic-16                     22.10µ ±   1%          22.23µ ±   1%        ~ (p=0.105 n=10)
Hash8K/sha1cd_cgo-16                         12.21µ ±   1%          12.29µ ±   2%        ~ (p=0.051 n=10)
HashWithCollision/sha1cd_native-16           2.786µ ±   0%          2.194µ ±   1%  -21.25% (p=0.000 n=10)
HashWithCollision/sha1cd_generic-16          3.084µ ±   1%          3.128µ ±   3%   +1.44% (p=0.017 n=10)
HashWithCollision/sha1cd_cgo-16              2.538µ ±   4%          2.506µ ±   2%   -1.24% (p=0.016 n=10)
CalculateDvMask/go-16                                        0.0000001500n ± 100%
geomean                                      73.89n                 171.9n          -9.52%                ¹
¹ benchmark set differs from baseline; geomeans may not be comparable


                                    │ /tmp/before  │              /tmp/after              │
                                    │     B/s      │     B/s       vs base                │
Hash8Bytes/sha1-16                    74.45Mi ± 1%   75.64Mi ± 3%        ~ (p=0.089 n=10)
Hash8Bytes/sha1cd_native-16           44.18Mi ± 1%   62.35Mi ± 1%  +41.13% (p=0.000 n=10)
Hash8Bytes/sha1cd_generic-16          36.99Mi ± 1%   36.51Mi ± 2%   -1.29% (p=0.008 n=10)
Hash8Bytes/sha1cd_cgo-16              10.76Mi ± 2%   10.71Mi ± 1%        ~ (p=0.926 n=10)
Hash320Bytes/sha1-16                  772.7Mi ± 1%   764.4Mi ± 1%   -1.07% (p=0.043 n=10)
Hash320Bytes/sha1cd_native-16         343.4Mi ± 2%   542.0Mi ± 3%  +57.81% (p=0.000 n=10)
Hash320Bytes/sha1cd_generic-16        278.5Mi ± 1%   286.6Mi ± 3%   +2.90% (p=0.003 n=10)
Hash320Bytes/sha1cd_cgo-16            242.0Mi ± 2%   240.4Mi ± 2%        ~ (p=0.353 n=10)
Hash1K/sha1-16                        1.203Gi ± 1%   1.194Gi ± 1%   -0.76% (p=0.007 n=10)
Hash1K/sha1cd_native-16               435.0Mi ± 2%   641.5Mi ± 1%  +47.48% (p=0.000 n=10)
Hash1K/sha1cd_generic-16              327.8Mi ± 1%   331.5Mi ± 2%        ~ (p=0.190 n=10)
Hash1K/sha1cd_cgo-16                  427.7Mi ± 3%   414.3Mi ± 2%   -3.14% (p=0.002 n=10)
Hash8K/sha1-16                        1.499Gi ± 2%   1.502Gi ± 1%        ~ (p=0.912 n=10)
Hash8K/sha1cd_native-16               457.2Mi ± 2%   683.3Mi ± 2%  +49.45% (p=0.000 n=10)
Hash8K/sha1cd_generic-16              353.6Mi ± 1%   351.4Mi ± 1%        ~ (p=0.105 n=10)
Hash8K/sha1cd_cgo-16                  639.7Mi ± 1%   635.6Mi ± 2%        ~ (p=0.052 n=10)
HashWithCollision/sha1cd_native-16    219.1Mi ± 0%   278.3Mi ± 1%  +26.99% (p=0.000 n=10)
HashWithCollision/sha1cd_generic-16   198.0Mi ± 1%   195.1Mi ± 2%   -1.44% (p=0.023 n=10)
HashWithCollision/sha1cd_cgo-16       240.5Mi ± 4%   243.5Mi ± 2%   +1.25% (p=0.015 n=10)
geomean                               247.1Mi        271.6Mi        +9.93%

⚠️ Note that the UBC native implementations have been removed as part of this PR, and ubc.CalculateDvMaskGeneric is no longer available.