NAS-133110 / 25.04 / add chelsio_adapter_config shim script

[yocalebo]

This is needed because we mark /usr as readonly=on. We need to temporarily disable that property so that the chelsio_adapter_config.py script (provided by Chelsio) can write to the various firmware bin files before flashing said bin files to the card.

1. move the chelsio_adapter_config.py file to libexec (which is not in PATH)
2. update the update_chelsio.py script so that any future developer that updates the linux uwire package keeps the same paths
3. create a shim script chelsio_adapter_config (its named without the extension because this is how its named on CORE, which is what the support team is most familiar with)

[bugclerk]

Jira URL: https://ixsystems.atlassian.net/browse/NAS-133110

[bugclerk]

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