[EVM] Add upgrade cw->erc20 pointer test

[stevenlanders]

Describe your changes and provide context

• registers the pointer registration types (bugfix)
• adds integration test for upgrading a cw20->erc20 pointer
• passes via governance proposal in the test

Testing performed to validate your change

• new integration test

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 60.70%. Comparing base (015816a) to head (5fba0a0).

Additional details and impacted files

[](https://app.codecov.io/gh/sei-protocol/sei-chain/pull/1695?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sei-protocol) ```diff @@ Coverage Diff @@ ## main #1695 +/- ## ========================================== + Coverage 60.53% 60.70% +0.16% ========================================== Files 368 368 Lines 26955 26958 +3 ========================================== + Hits 16318 16365 +47 + Misses 9527 9481 -46 - Partials 1110 1112 +2 ``` | [Files](https://app.codecov.io/gh/sei-protocol/sei-chain/pull/1695?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sei-protocol) | Coverage Δ | | |---|---|---| | [x/evm/types/gov.go](https://app.codecov.io/gh/sei-protocol/sei-chain/pull/1695?src=pr&el=tree&filepath=x%2Fevm%2Ftypes%2Fgov.go&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sei-protocol#diff-eC9ldm0vdHlwZXMvZ292Lmdv) | `9.79% <100.00%> (+1.93%)` | :arrow_up: | ... and [4 files with indirect coverage changes](https://app.codecov.io/gh/sei-protocol/sei-chain/pull/1695/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sei-protocol)