Implement genesis block validation function in lisk-genesis

[nazarhussain]

Description

• Create validateGenesisBlock = (params: genesisBlock) => boolean for schema validation

This function should follow the rules for any genesis block b;

• The value b.header.version is 0, which is the block version used for this block.
• The value b.header.timestamp is a Unix time in seconds and can be any value in the uint32 range.
• The value b.header.height can be any value in the uint32 range.
• The valueb.header.previousBlockID can be any 32-byte value.
• The value of b.header.transactionRoot is computed and verified as specified in LIP 0032, as for any other block.
• The value of b.header.generatorPublicKey must be empty bytes.
• The value of b.header.reward must be 0.
• The value of b.header.asset.accounts must be an array of serialized accounts according
• The value of the property b.header.asset.initDelegates must be an array of distinct 20-byte values
• The value of b.header.asset.initRounds must be at least 3.
• The value of b.header.signature must be empty bytes.

More details can be found on

https://github.com/LiskHQ/lips/blob/master/proposals/lip-0034.md#block-validity

Motivation

This function is required to validate genesis block with new schema.

Acceptance Criteria

• Unit tests are added to validate genesis block with default values and custom values.
• It must have unit test for all given rules of valid blocks

Additional Information

Related issues: #5234

[nazarhussain]

As this issue is partially been covered in creation PR, so assigning it to myself.