[tests/e2e]: simplify the logic for adding accounts to genesis sdk side and integrate into e2e

[p0mvn]

Background

We should simplify the process of adding accounts to genesis on the SDK side to improve readability in e2e set up. This issue includes making additions to our SDK fork, updating the dependency in osmosis, and, eventually, adding it to our e2e set up.

Please follow this comment for more information: #1625 (comment)_

Acceptance Criteria

• investigate an easier way to add accounts to genesis
• implement the improvement in Osmosis's SDK fork and unit test
• update the sdk dependency in Osmosis's go.mod
• refactor e2e set up to utilize the simpler method

[p0mvn]

What needs to be done is the following:

• backport Make helper functions for adding accounts to genesis state. cosmos/cosmos-sdk#12091 to our sdk fork
• update SDK dependency
• refactor e2e genesis logic to use the simplified helper

[p0mvn]

Reopining for the fix to follow-up on the following CI failure: https://github.com/osmosis-labs/osmosis/actions/runs/4338982856/jobs/7576658435