feat: Add QueryAllPairsValConAddrByConsumerChainID (backport #1503)

[mergify]

This is an automatic backport of pull request #1503 done by Mergify.
Cherry-pick of 56399f6 has failed:

On branch mergify/bp/release/v3.3.x/pr-1503
Your branch is up to date with 'origin/release/v3.3.x'.

You are currently cherry-picking commit 56399f6.
  (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:
	new file:   .changelog/unreleased/improvements/provider/1503-query-key-assignment.md
	modified:   docs/docs/features/key-assignment.md
	modified:   proto/interchain_security/ccv/provider/v1/query.proto
	modified:   tests/e2e/tracehandler_testdata/changeover.json
	modified:   tests/e2e/tracehandler_testdata/consumer-double-sign.json
	modified:   tests/e2e/tracehandler_testdata/consumer-misbehaviour.json
	modified:   tests/e2e/tracehandler_testdata/democracy.json
	modified:   tests/e2e/tracehandler_testdata/democracyRewardsSteps.json
	modified:   tests/e2e/tracehandler_testdata/happyPath.json
	modified:   tests/e2e/tracehandler_testdata/multipleConsumers.json
	modified:   tests/e2e/tracehandler_testdata/shorthappy.json
	modified:   x/ccv/provider/client/cli/query.go
	modified:   x/ccv/provider/keeper/grpc_query.go
	new file:   x/ccv/provider/keeper/grpc_query_test.go
	modified:   x/ccv/provider/types/query.pb.go
	modified:   x/ccv/provider/types/query.pb.gw.go

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

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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