refactor: emit tick spread factor reward and uptime reward events when tick is crossed (APR calc #1)

[p0mvn]

Closes: #XXX

What is the purpose of the change

This PR introduces changes necessary for the data team to compute the position APRs.

Data team needs to track 4 things to be able to do that:

1. Spread reward and uptime accumulator tick updates in events (this PR)
2. Query pool spread rewards accumulator (future PR)
3. Query pool uptime accumulator (future PR)
4. Query reward accumulators for each individual tick (future PR)

This PR focuses on point #1 only.

To enable this adds a new proto generated struct

message UptimeTrackers {
  repeated UptimeTracker list = 1
      [ (gogoproto.moretags) = "yaml:\"list\"", (gogoproto.nullable) = false ];
}

This allows us tor serialize the uptime tracker list easily for the events. Otherwise, we would have to implement a custom serializer.

Testing and Verifying

• Added basic test that event is emitted

Documentation and Release Note

• Does this pull request introduce a new feature or user-facing behavior changes?
• Changelog entry added to Unreleased section of CHANGELOG.md?

Where is the change documented?

• Specification (x/{module}/README.md)
• Osmosis documentation site
• Code comments?
• N/A