stakeibc file re-org part 3 (ibc, ica, icq, and utilities)

[sampocs]

Context

Stakeibc has grown quite large over the years. This PR does a file re-org cleanup to better organize functions and remove ignite tech debt. This should make it easier to onboard new devs to the codebase.

Note to reviewer: There were no logical changes made in this PR. It only copy pasted functions to different files. When reviewing, I'd recommend scrolling each commit and making sure all functions are accounted for during the move.

Brief Changelog

Logically grouped ibc/ica/icq code and other utilities into the following files:

• interchainaccounts.go
• interchainqueries.go
• ibc.go
• redemption_rate.go
• invariants.go

[ethan-stride]

LGTM
Made sure any removed function was added somewhere else, walked the commits this time which made it easier to conceptualize.
I semi-disagree with rename of update_redemption_rate_test to just redemption_rate_test unless you are going to add other tests around RR into the renamed file later. Better to be specific, if you want the name to be shorter do update_RR_test or something

[sampocs]

we'll add more tests to that file