fix: sanitize gov v1 proposal in e2e tests for compatibility with 0.52

[gjermundgaraba]

Description

Closes #7844

I will run the compatibility tests with this branch before merging.

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[gjermundgaraba]

I've confirmed that the compatibility tests seem to mostly work OK now.
There are a few tests that are still failing, but it is not obvious that this is related to the 0.52 upgrade, so I pulled those out to a separate issue, so we can close this:
#7864

[AdityaSripal]

nit: maybe mutate or convert instead of replace. since i expected this to be returning a new type rather than mutating in-place

[gjermundgaraba]

Good point! Done!

[sonarqubecloud]

Quality Gate passed for 'ibc-go'

Issues
105 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud