[CSL-15] Add secret to local commitments when it's generated

[jagajaga]

@Gromak

When node generates a secret (currently it happens at the beginning of 0-th slot of any epoch), it should add corresponding commitment to mpcLocalCommitments and put it into generated block later (if it's leader). Currently it's not done.
I don't know about openning for own locally stored secret, but it should also be added to local openings and to block.

[jagajaga]

@Gromak

Done except shares. Ideally we also should ensure that our shares are in block created by us (if not in someone else's block). However, it's harder to do and is less important, because we don't need shares usually.

[jagajaga]

@Gromak

Approach is that secrets/openings are not put into local maps when they are generated or something, but they are put into MpcData which is result of getLocalMpcData.