Drop msrestazure dependency for Spring extension

[moarychan]

---

Changelogs:

• Replace msrestazure with azure.core, refer the PR Replace msrestazure with azure.core #7899
• Update to available dev owner

General Guidelines

• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally? (pip install wheel==0.30.0 required)
• My extension version conforms to the Extension version schema

For new extensions:

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

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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

️✔️Non Breaking Changes

[azure-client-tools-bot-prd]

Hi @moarychan,
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.

[github-actions]

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[github-actions]

• For more info about extension versioning, please refer to Extension version schema

[moarychan]

Hi @jsntcy, could help review this PR, thanks!

[moarychan]

Hi @jsntcy, please help merge this PR, Many thanks!

[azclibot]

[Release] Update index.json for extension [ spring ] : https://dev.azure.com/azclitools/release/_build/results?buildId=187630&view=results