Fix an error when incomplete S3Client is destroyed #834

Job	Run time
Code Quality	1m 33s
Mocked Tests (ubuntu-latest, Python 3.7)	2m 50s
Mocked Tests (ubuntu-latest, Python 3.8)	2m 27s
Mocked Tests (ubuntu-latest, Python 3.9)	2m 32s
Mocked Tests (ubuntu-latest, Python 3.10)	2m 50s
Mocked Tests (ubuntu-latest, Python 3.11)	2m 29s
Mocked Tests (ubuntu-latest, Python 3.12)	3m 35s
Mocked Tests (macos-latest, Python 3.7)	5m 25s
Mocked Tests (macos-latest, Python 3.8)	3m 6s
Mocked Tests (macos-latest, Python 3.9)	2m 42s
Mocked Tests (macos-latest, Python 3.10)	2m 33s
Mocked Tests (macos-latest, Python 3.11)	2m 43s
Mocked Tests (macos-latest, Python 3.12)	5m 12s
Mocked Tests (windows-latest, Python 3.7)	6m 16s
Mocked Tests (windows-latest, Python 3.8)	6m 2s
Mocked Tests (windows-latest, Python 3.9)	6m 17s
Mocked Tests (windows-latest, Python 3.10)	6m 13s
Mocked Tests (windows-latest, Python 3.11)	6m 9s
Mocked Tests (windows-latest, Python 3.12)	6m 12s
Test independent installs of clients	0s
Live Tests	0s
Notify failed build	0s
	1h 17m 6s

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