BFT weight mainchain registration

[has5aan]

What was the problem?

This PR resolves #8782

How was it solved?

Updates RegisterMainchainCommand.verify to throw if total BFT weight exceeds MAX_UINT64 after aggregating BFT weight of each validator.

How was it tested?

Verifying if existing tests are passing.

[codecov]

Codecov Report

Merging #8794 (9e6e59f) into release/6.0.0 (c49607a) will increase coverage by 0.05%.
Report is 111 commits behind head on release/6.0.0.
The diff coverage is 84.90%.

❗ Current head 9e6e59f differs from pull request most recent head ac9588a. Consider uploading reports for the commit ac9588a to get more accurate results

Additional details and impacted files

@@                Coverage Diff                @@
##           release/6.0.0    #8794      +/-   ##
=================================================
+ Coverage          83.27%   83.33%   +0.05%     
=================================================
  Files                593      594       +1     
  Lines              22254    22329      +75     
  Branches            3252     3292      +40     
=================================================
+ Hits               18532    18607      +75     
  Misses              3722     3722              

Files Changed	Coverage Δ
commander/src/base.ts	65.38% <0.00%> (-24.09%)	⬇️
commander/src/utils/genesis_creation.ts	69.23% <ø> (+38.46%)	⬆️
commander/test/helpers/transactions.ts	96.00% <ø> (-0.16%)	⬇️
elements/lisk-api-client/src/codec.ts	67.51% <ø> (ø)
elements/lisk-chain/src/schema.ts	100.00% <ø> (ø)
elements/lisk-p2p/src/schema.ts	100.00% <ø> (ø)
elements/lisk-transaction-pool/src/index.ts	0.00% <0.00%> (ø)
...n-connector-plugin/src/active_validators_update.ts	80.35% <0.00%> (ø)
...sk-framework-chain-connector-plugin/src/schemas.ts	100.00% <ø> (ø)
...k-framework-dashboard-plugin/src/plugin/schemas.ts	100.00% <ø> (ø)
... and 56 more

... and 78 files with indirect coverage changes