Optimize SHA computations for .NET 8+

[Carti-it]

Stacked on #1315 to avoid conflicts

master:

Method	Mean	Error	StdDev	Gen0	Allocated
SHA1	546.5 ns	10.91 ns	25.06 ns	0.0353	224 B
SHA256	578.6 ns	11.50 ns	19.52 ns	0.0381	240 B
SHA512	679.1 ns	13.48 ns	24.30 ns	0.0477	304 B

PR:

Method	Mean	Error	StdDev	Median	Gen0	Allocated
SHA1	300.7 ns	6.01 ns	10.68 ns	305.7 ns	0.0076	48 B
SHA256	365.5 ns	7.29 ns	10.46 ns	370.5 ns	0.0086	56 B
SHA512	445.5 ns	4.86 ns	3.79 ns	444.7 ns	0.0138	88 B

The CPU time improvements are in the range of 35% - 45% and memory improvements are 70%+.

[Carti-it]

This is to avoid .ToArray() copy.