[Spring] certificate - Add argument --auto-sync and new command update

[domainname]

• Add argument --auto-sync in az spring certificate add.
• Add new command az spring certificate update to update a certificate.

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Related command

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• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally?

For new extensions:

• My extension description/summary conforms to the Extension Summary Guidelines.

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There is a pipeline to automatically build, upload and publish extension wheels.
Once your pull request is merged into main branch, a new pull request will be created to update src/index.json automatically.
You only need to update the version information in file setup.py and historical information in file HISTORY.rst in your PR but do not modify src/index.json.

[azure-client-tools-bot-prd]

⚠️Azure CLI Extensions Breaking Change Test

⚠️spring

rule	cmd_name	rule_message	suggest_message
⚠️ 1006 - ParaAdd	spring certificate add	cmd spring certificate add added parameter enable_auto_sync
⚠️ 1001 - CmdAdd	spring certificate update	cmd spring certificate update added

[azure-client-tools-bot-prd]

Hi @domainname,
Please write the description of changes which can be perceived by customers into HISTORY.rst.
If you want to release a new extension version, please update the version in setup.py as well.

[yonzhan]

Thank you for your contribution! We will review the pull request and get back to you soon.