Display monthly & annual usage in Admin/Metrics

Removed unneeded alwaysShowUniqueTaskWorkerMetrics config.
Show only one date picker to select Subscription start date
- Allow exact day selection.
- Store the value in local storage.
- Edge case: When reading from local storage, check that the date is within a year.
- Update the value if the contract start date is more than a year behind.
Remove the current results component.
Display the Usage Last 12 Months
- Display a table for the Usage Last 12 Months.
- Display last rolling 12 months that have data available.
- Mark subscription start.
- Last row should be the current month.
- Display TU, PI, DI columns.
- Add an info tooltip for TU explaining that it shows accumulated value.
- Add checkbox to display legacy metrics.
Display a table for the Annual usage
- Display contract years that have data available.
- Last year should be the current one.
- Display all 5 metrics.
Action buttons
- Copy to clipboard.
- Add copy to current year too.
- Copy format.
- Format includes date range, metrics names and value
- Format includes diagnostics data without the commands and metrics objects.
  - /api/engine/engine/default/telemetry/data
  - Copy in a parseable format, like JSON. Show it to PM during implementation.

### Tasks
- [ ] https://github.com/camunda/camunda-bpm-platform/pull/4105
- [ ] https://github.com/camunda/camunda-bpm-platform-ee/pull/902

camunda / camunda-bpm-platform