added latest_version, current_version, ramping_version summaries in ListDeployment (#594)

_**READ BEFORE MERGING:** All PRs require approval by both Server AND
SDK teams before merging! This is why the number of required approvals
is "2" and not "1"--two reviewers from the same team is NOT sufficient.
If your PR is not approved by someone in BOTH teams, it may be summarily
reverted._

<!-- Describe what has changed in this PR -->
**What changed?**
- WISOTT

<!-- Tell your future self why have you made these changes -->
**Why?**
- making more information available in one API call rather than via
multiple API calls.

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**Breaking changes**

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right after this PR was merged. -->
**Server PR**
- temporalio/temporal#7802

Author: Shivs11