Change pool state root hash for BLS-signature in Commit messages

Change pool_state_root_hash in Commit MultiSignatureValue to pre_prepare.pool_state_root_hash.
Acceptance criteria

• Add field "POOL_STATE_ROOT_HASH" to PrePrepare message (Put it before PLUGIN_FIELDS)
• Add validation of new PrePrepare format. Its POOL_STATE_ROOT_HASH should be included in the uncommitted state root hash
• Change commit BLS signature creating. Now it should use pool state root hash from PrePrepare message instead committed state root hash.
• Change validation of a commit BLS signature. Now it should use pool state root hash from PrePrepare message instead committed state root hash.
• Change logging message in case with incorrect BLS signature for commit message. Add information about an incorrect Commit message
• Add tests