feat!: Add DistributionTransmissionChannel to ConsumerAdditionProposal (backport #965)

[mergify]

This is an automatic backport of pull request #965 done by Mergify.
Cherry-pick of 0b636da has failed:

On branch mergify/bp/release/v2.0.x/pr-965
Your branch is up to date with 'origin/release/v2.0.x'.

You are currently cherry-picking commit 0b636da.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   CHANGELOG.md
	modified:   Dockerfile
	modified:   Dockerfile.gaia
	modified:   Makefile
	modified:   app/consumer-democracy/app.go
	new file:   app/sovereign/ante_handler.go
	new file:   app/sovereign/app.go
	new file:   app/sovereign/export.go
	new file:   app/sovereign/genesis.go
	new file:   cmd/interchain-security-sd/cmd/genaccounts.go
	new file:   cmd/interchain-security-sd/cmd/root.go
	new file:   cmd/interchain-security-sd/main.go
	modified:   docs/docs/consumer-development/onboarding.md
	modified:   docs/docs/features/proposals.md
	modified:   proto/interchain_security/ccv/consumer/v1/genesis.proto
	modified:   proto/interchain_security/ccv/provider/v1/provider.proto
	new file:   tests/e2e/actions_sovereign_chain.go
	modified:   tests/e2e/config.go
	modified:   tests/e2e/main.go
	modified:   tests/e2e/state.go
	modified:   tests/e2e/steps.go
	new file:   tests/e2e/steps_sovereign_changeover.go
	new file:   tests/e2e/testnet-scripts/sovereign-genesis.json
	new file:   tests/e2e/testnet-scripts/start-changeover.sh
	new file:   tests/e2e/testnet-scripts/start-sovereign.sh
	modified:   tests/integration/changeover.go
	modified:   testutil/keeper/unit_test_helpers.go
	modified:   x/ccv/consumer/ibc_module.go
	modified:   x/ccv/consumer/ibc_module_test.go
	modified:   x/ccv/consumer/keeper/changeover.go
	modified:   x/ccv/consumer/keeper/keeper.go
	modified:   x/ccv/consumer/keeper/keeper_test.go
	modified:   x/ccv/consumer/keeper/migration_test.go
	modified:   x/ccv/consumer/types/genesis_test.go
	modified:   x/ccv/consumer/types/params.go
	modified:   x/ccv/provider/client/proposal_handler.go
	modified:   x/ccv/provider/keeper/proposal.go
	modified:   x/ccv/provider/keeper/proposal_test.go
	modified:   x/ccv/provider/proposal_handler_test.go
	modified:   x/ccv/provider/types/proposal.go
	modified:   x/ccv/provider/types/proposal_test.go
	modified:   x/ccv/provider/types/provider.pb.go
	modified:   x/ccv/types/shared_params.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   tests/e2e/actions.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[shaspitz]

lol I screwed up this PR, will backport manually