tiup/mirror: add ability to change owner of a component

[AstroProfundis]

What problem does this PR solve?

Change the owner of a component.

What is changed and how it works?

Use a process like rotating root.json:

• On server side, the server admin run tiup mirror transfer-owner command to initialize a owner transfer process
• The existence of new owner is checked, then open a temp HTTP server to serve the component.json
• Client with the new owner's private key use tiup mirror sign to sign that temp URL
• Server validate the signature received and update component.json along with index.json

The process is a pure administration operation, and could be used without the participate of old owner of the component, so that it also works if the old owner is absent for long time and can not be contacted.

The new owner must be granted before the transfer.

Check List

Tests

• Manual test (add detailed scripts or steps below)

Code changes

• Has exported function/method change
• Has interface methods change

Release notes:

NONE

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lucklove

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

The full list of commands accepted by this bot can be found here.

Reviewer can indicate their review by submitting an approval review.
Reviewer can cancel approval by submitting a request changes review.

[codecov-commenter]

Codecov Report

Merging #1676 (dcc8478) into master (3523106) will increase coverage by 17.60%.
The diff coverage is 32.31%.

❗ Current head dcc8478 differs from pull request most recent head d88c403. Consider uploading reports for the commit d88c403 to get more accurate results

@@             Coverage Diff             @@
##           master    #1676       +/-   ##
===========================================
+ Coverage   14.81%   32.41%   +17.60%     
===========================================
  Files         152      247       +95     
  Lines       18751    28842    +10091     
===========================================
+ Hits         2777     9347     +6570     
- Misses      15457    18179     +2722     
- Partials      517     1316      +799     

Flag	Coverage Δ
cluster	27.27% <0.00%> (?)
unittest	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/repository/model/publish.go	40.00% <0.00%> (-36.92%)	⬇️
cmd/mirror.go	46.08% <26.09%> (ø)
pkg/repository/model/model.go	37.24% <52.94%> (-6.18%)	⬇️
server/rotate/root.go
components/cluster/command/transfer.go	50.00% <0.00%> (ø)
pkg/cluster/manager/edit_config.go	28.72% <0.00%> (ø)
pkg/cluster/manager/cleanup.go	0.00% <0.00%> (ø)
pkg/cluster/task/scale_config.go	0.00% <0.00%> (ø)
... and 179 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3523106...d88c403. Read the comment docs.

[lucklove]

LGTM

[AstroProfundis]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: d88c403