MA0050 fixer correctly handle EnumeratorCancellation attribute #1024

Job	Run time
compute_package_version	12s
build_and_test (ubuntu-latest, Debug, roslyn3.8)	2m 29s
build_and_test (ubuntu-latest, Debug, roslyn4.2)	2m 53s
build_and_test (ubuntu-latest, Debug, roslyn4.4)	2m 28s
build_and_test (ubuntu-latest, Debug, default)	2m 26s
build_and_test (ubuntu-latest, Release, roslyn3.8)	2m 43s
build_and_test (ubuntu-latest, Release, roslyn4.2)	2m 47s
build_and_test (ubuntu-latest, Release, roslyn4.4)	2m 49s
build_and_test (ubuntu-latest, Release, default)	2m 35s
build_and_test (windows-latest, Debug, roslyn3.8)	5m 57s
build_and_test (windows-latest, Debug, roslyn4.2)	7m 17s
build_and_test (windows-latest, Debug, roslyn4.4)	8m 13s
build_and_test (windows-latest, Debug, default)	7m 15s
build_and_test (windows-latest, Release, roslyn3.8)	5m 42s
build_and_test (windows-latest, Release, roslyn4.2)	7m 13s
build_and_test (windows-latest, Release, roslyn4.4)	6m 11s
build_and_test (windows-latest, Release, default)	7m 16s
create_nuget	3m 3s
validate_nuget	42s
deploy	17s
create_release	14s
	1h 20m 42s

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