Fix operator generator command excluding alloc field

[jframe]

PR description

Fixes the operator generator command so the genesis config alloc fields are included in the newly generated genesis file. This is a regression that was introduced recently in release 24.7.0.

The cause of the issue was the alloc field was removed from the ObjectNode argument when parsing the genesis file. I've modified the GenesisReader.FromObjectNode method so that the argument is no longer mutated. This is done by not removing the field from the ObjectNode and excluding it when normalising the keys adding a new normaliseKeys that takes a predicate.

Also fixed the config files used for the operator subcommand test to have the ibft and qbft config in the correct place in the genesis file.

Fixed Issue(s)

fixes #7484

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[macfarla]

LGTM