Automated cherry pick of #2105: Support Python 3.11 and Drop Python 3.7 #2109: changed package name to flake8 to fix pip install #2122: Fix Incorrect Events in get_job_logs API

[tenzen-y]

Cherry pick of #2105 #2109 #2122 on v1.8-branch.
#2105: Support Python 3.11 and Drop Python 3.7
#2109: changed package name to flake8 to fix pip install
#2122: Fix Incorrect Events in get_job_logs API
For details on the cherry pick process, see the cherry pick requests page.

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[google-oss-prow]

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[tenzen-y]

/close

[google-oss-prow]

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[coveralls]

Pull Request Test Coverage Report for Build 9419596348

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.05%) to 35.431%

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Totals
Change from base Build 8869266420:	0.05%
Covered Lines:	4380
Relevant Lines:	12362

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💛 - Coveralls