fix(minor-multisig-prover): set active verifiers fix

[cjcobb23]

• set the active verifiers with the coordinator when first updating the verifier set

https://axelarnetwork.atlassian.net/browse/AXE-4871

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 97.56098% with 5 lines in your changes missing coverage. Please review.

Project coverage is 93.65%. Comparing base (6bc955b) to head (7c4df4d). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
.../multisig-prover/src/contract/migrations/v1_0_0.rs	98.24%	3 Missing :warning:
contracts/multisig-prover/src/contract.rs	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #628 +/- ## ========================================== + Coverage 93.63% 93.65% +0.02% ========================================== Files 240 240 Lines 33870 33838 -32 ========================================== - Hits 31714 31692 -22 + Misses 2156 2146 -10 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.