{App Config} Fix #12668860, #12668922: Fix validations while importing kvset

[pratiksanglikar]

Description

• Fixes #12668922 Added validations to the command az appconfig import when appconfig/kvset profile is used and tags are not in string format.
• Fixes #12668860 Handled cases where optional parameters were present in the import file for az appconfig import command and appconfig/kvset profile was used for import.

---

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[pratiksanglikar]

@avanigupta, @shenmuxiaosen please take a look!

[yonzhan]

App Config

[wangzelin007]

@pratiksanglikar
Please fix the CLI Style error, you can run azdev style appconfig to check the error in your local environment.
And add @avanigupta Avani Gupta FTE, @shenmuxiaosen Shuai Wang FTE to Reviewers.

[zhoxing-ms]

@pratiksanglikar Could you please address those comments from @shenmuxiaosen, and ask him to review this PR again and approve it

Please note that if you can't address these comments today, this PR will not catch up with the release date of this sprint and can only be postponed to the next sprint (2022-01-04)

[shenmuxiaosen]

[pratiksanglikar]

@zhoxing-ms, The PR has been signed off.
Can you please include this PR in today's release?
cc: @wangzelin007

[wangzelin007]

@zhoxing-ms Xing Zhou FTE, The PR has been signed off. Can you please include this PR in today's release? cc: @wangzelin007 Zelin Wang FTE

DONE