tbls: remove legacy Kryptology-based code

[gsora]

This PR removes the old tbls package content, and replaces it with tbls/v2 content.

As a consequence, the tbls/v2 package doesn't exist anymore.

All imports have been refactored to accomodate this change.

Kryptology tbls.Implementation will be removed on a follow-up PR.

category: refactor
ticket: #2055

[codecov]

Codecov Report

Patch coverage: 84.31% and project coverage change: +0.04 🎉

Comparison is base (ed5d746) 53.59% compared to head (521c027) 53.64%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2091      +/-   ##
==========================================
+ Coverage   53.59%   53.64%   +0.04%     
==========================================
  Files         174      172       -2     
  Lines       22697    22411     -286     
==========================================
- Hits        12165    12022     -143     
+ Misses       9015     8911     -104     
+ Partials     1517     1478      -39     

Impacted Files	Coverage Δ
app/app.go	7.81% <0.00%> (ø)
cluster/distvalidator.go	91.89% <0.00%> (ø)
tbls/herumi.go	55.20% <ø> (ø)
tbls/kryptology.go	47.70% <ø> (ø)
tbls/tbls.go	100.00% <ø> (ø)
testutil/validatormock/validatormock.go	31.57% <0.00%> (ø)
eth2util/signing/signing.go	36.73% <50.00%> (ø)
eth2util/keystore/keystore.go	52.67% <77.77%> (ø)
core/validatorapi/validatorapi.go	58.29% <83.33%> (ø)
dkg/dkg.go	59.38% <84.00%> (ø)
... and 14 more

... and 7 files with indirect coverage changes

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