Versioning 3.1 APIs (#540)

_**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?**
- Renamed `DeploymentSeries` -> `WorkerDeployment` and `Deployment` ->
`WorkerDeploymentVersion`.
- Added the following experimental APIs:
  - ListWorkerDeployments
  - DescribeWorkerDeployment
  - DescribeWorkerDeploymentVersion
  - SetWorkerDeploymentCurrentVersion
  - SetWorkerDeploymentRampingVersion
  - UpdateWorkerVersionMetadata
  - DeleteWorkerDeployment
  - DeleteWorkerDeploymentVersion
- Deprecated the following experimental APIs:
  - DescribeDeployment
  - ListDeployments
  - GetDeploymentReachability
  - GetCurrentDeployment
  - SetCurrentDeployment

<!-- Tell your future self why have you made these changes -->
**Why?**
These are changes and improvements we made based on user feedback from
the previous iteration.

<!-- Are there any breaking changes on binary or code level? -->
**Breaking changes**
No breaking changes, the old APIs still work until cleaned up at a later
point with all other old Versioning APIs.

<!-- If this breaks the Server, please provide the Server PR to merge
right after this PR was merged. -->
**Server PR**
temporalio/temporal#7233

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Co-authored-by: Shivam <[email protected]>
Co-authored-by: Shahab Tajik <[email protected]>
Co-authored-by: ShahabT <[email protected]>

Author: 3 people