temporarily revert az cli version used in runners

[OliverMKing]

Description

temporarily reverts cli version used in runners due to az cli regression.

https://github.com/Azure/login/issues/372 https://github.com/AzureAD/microsoft-authentication-extensions-for-python/issues/127

The fix is done and ready upstream but needs to be released in the az cli which won't happen for ~3 weeks (need az cli release and it to be baked into github runner).

[OliverMKing]

/ok-to-test sha=bbbf2c3

[coveralls]

Pull Request Test Coverage Report for Build 8690455021

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 80.257%

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Totals
Change from base Build 8540861206:	0.0%
Covered Lines:	2870
Relevant Lines:	3576

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💛 - Coveralls