Shared tree/rebaser telemetry

[jikim-msft]

Description

ADO 5141

This PR creates telemetry loggers for the SharedTree DDS which emit telemetry events for rebase operations of below scenarios:

• rebasing the EditManager local branch over new peer edits
• rebasing an EditManager peer branch over trunk edits when adjusting the branch to the peer's new ref seq
• rebasing a new peer edit to the tip of the trunk
• rebasing the inverse of a revertible.
• rebasing a user branch

The event will include:

• parent branch length
• child branch length
• time duration

Note: Instead of logging the event for every rebase operation, we should log events in batch (e.g., every 100 operations).