[CDF-25970] 😄Migrate timeseries (#2134)

# Description


Stacked on #2127, #2126, #2095, #2128

**Context**: This is part of the `alpha` migration tooling in Toolkit,
for overview [see
here](https://cognitedata.atlassian.net/wiki/spaces/~170890702/pages/5455773697/Migration+Tooling+in+Toolkit).
This is step 3 of that process.

This is the third of the 'v2' migration commands. This uses the new
generic interface to migrate timeseries and linking them..
<img width="1778" height="369" alt="image"
src="https://github.com/user-attachments/assets/9c057989-8750-4979-b877-744e9a136b88"
/>

<img width="1455" height="262" alt="image"
src="https://github.com/user-attachments/assets/37323f10-c544-4037-a09c-a86c461f1045"
/>


## Changelog

- [x] Patch
- [ ] Skip

## cdf

### Changed

- [alpha] The command `cdf migrate timeseries` now support migrating a
dataset. You can also now chose to skip the linking to existing
timeseries.

## templates

No changes.
