feat: register init contracts on second block of strategy

[pauldelucia]

Issue being fixed or feature implemented

Before, we could only register 24 contracts on the first block of the strategy because we only had one identity available in the TUI (the loaded identity) and 24 is the nonce limit.

What was done?

Now, we process the start_identities on the first block of the strategy, and the initial contracts on the second block. This way we can use the new identities to create more initial contracts.

How Has This Been Tested?

Platform TUI

Breaking Changes

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have added "!" to the title and described breaking changes in the corresponding section if my code contains any
• I have made corresponding changes to the documentation if needed

For repository code-owners and collaborators only

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