runtime-sdk: bump crypto deps

[nhynes]

I had some trouble getting p384 working because sha2, ed25519_dalek, and a few other crypto deps were a version behind. Such is the state of Rust crypto. Anyway, this PR does not change any functionality, but I did remove one test for rejecting all-zero ed25519 private keys because [0u8; 32] is a valid private key, just not one you'd want to use.

[codecov]

Codecov Report

Merging #1518 (a700acf) into main (7d979b9) will increase coverage by 1.45%.
The diff coverage is 82.14%.

@@            Coverage Diff             @@
##             main    #1518      +/-   ##
==========================================
+ Coverage   59.03%   60.49%   +1.45%     
==========================================
  Files         138      138              
  Lines        9874     9904      +30     
==========================================
+ Hits         5829     5991     +162     
+ Misses       4003     3871     -132     
  Partials       42       42              

Files	Coverage Δ
contract-sdk/crypto/src/x25519.rs	94.44% <100.00%> (ø)
runtime-sdk/modules/evm/src/precompile/sha512.rs	100.00% <100.00%> (ø)
runtime-sdk/src/crypto/signature/digests.rs	20.83% <ø> (+0.32%)	⬆️
runtime-sdk/src/crypto/signature/mod.rs	71.87% <100.00%> (ø)
runtime-sdk/src/storage/confidential.rs	72.13% <ø> (ø)
runtime-sdk/src/crypto/signature/sr25519.rs	36.84% <0.00%> (ø)
...ime-sdk/modules/evm/src/precompile/confidential.rs	80.32% <33.33%> (-1.10%)	⬇️
runtime-sdk/src/crypto/signature/ed25519.rs	84.21% <85.10%> (-2.94%)	⬇️

... and 2 files with indirect coverage changes