Add upgrade handler for v3.0.2

[catShaark]

Description and Motivation

This PR include the code for upgrade handler of v3.0.2 which is needed since we have a upgrade gov prop.
The upgrade handler is basically a no-op.

Related Issues

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Checklist:

• I have read Migaloo's contribution guidelines.
• My pull request has a sound title and description (not something vague like Update index.md)
• All existing and new tests are passing.
• I updated/added relevant documentation.
• The code is formatted properly golangci-lint run ./... --fix.