add exported wrapper funcs for random seed util

[kc1116]

Adds exported funcs that wrap seed generation util funcs. This is needed to use key generation util funcs in other projects.

[codecov-commenter]

Codecov Report

Merging #1014 (ccb1a0b) into feature/epochs (269fbe7) will decrease coverage by 0.05%.
The diff coverage is 0.00%.

@@                Coverage Diff                 @@
##           feature/epochs    #1014      +/-   ##
==================================================
- Coverage           54.16%   54.10%   -0.06%     
==================================================
  Files                 310      310              
  Lines               21068    21069       +1     
==================================================
- Hits                11411    11399      -12     
- Misses               8111     8126      +15     
+ Partials             1546     1544       -2     

Flag	Coverage Δ
unittests	54.10% <0.00%> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cmd/bootstrap/cmd/util.go	58.49% <0.00%> (-2.30%)	⬇️
...sus/approvals/assignment_collector_statemachine.go	42.30% <0.00%> (-9.62%)	⬇️
cmd/util/ledger/migrations/storage_v4.go	41.56% <0.00%> (-0.61%)	⬇️
fvm/transactionInvocator.go	80.00% <0.00%> (-0.10%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 269fbe7...ccb1a0b. Read the comment docs.