fix: do not allow the update of initialization parameters of launched chains and stop a chain from launching if

[insumity]

Description

This PR introduces 2 changes:

• do not allow the update of initialization parameters of launched chains
• stop an initialized chain from getting launched if a MsgUpdateConsumer is sent with initializationParameters.SpawnTime that is zero and move the chain back to the REGISTERED phase

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[p-offtermatt]

LGTM. This means there is now a way to move back to Registered from Initialized, is there any place where we need the assumption that this cannot happen? I think that it is ok in principle.

[mpoke]

LGTM