[WIP] Add partial ownership transfer to UC DAO module

[Yurist-85]

Closes: #XXX

Description

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For contributor use:

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer

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For admin use:

• Added appropriate labels to PR (ex. WIP, R4R, docs, etc)
• Reviewers assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 63.38583% with 93 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
x/ucdao/types/msg.go	43.66%	35 Missing and 5 partials ⚠️
x/ucdao/keeper/keeper.go	58.06%	9 Missing and 4 partials ⚠️
x/ucdao/keeper/grpc_query.go	69.69%	6 Missing and 4 partials ⚠️
x/ucdao/keeper/msg_server.go	83.33%	4 Missing and 5 partials ⚠️
x/ucdao/keeper/account_balances.go	79.48%	6 Missing and 2 partials ⚠️
x/ucdao/keeper/genesis.go	0.00%	7 Missing ⚠️
x/ucdao/types/keys.go	50.00%	4 Missing and 2 partials ⚠️

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