fix(client): unmask connection errors in ClientSessionGroup teardown (#915) #1996

Job	Run time
checks / readme-snippets	13s
checks / pre-commit	32s
checks / test (3.12, locked, windows-latest)	4m 10s
checks / test (3.11, lowest-direct, ubuntu-latest)	51s
checks / test (3.10, lowest-direct, ubuntu-latest)	52s
checks / test (3.12, lowest-direct, ubuntu-latest)	59s
checks / test (3.12, lowest-direct, windows-latest)	3m 37s
checks / test (3.11, lowest-direct, windows-latest)	3m 4s
checks / test (3.11, locked, windows-latest)	2m 33s
checks / test (3.13, locked, ubuntu-latest)	45s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 19s
checks / test (3.13, lowest-direct, windows-latest)	2m 51s
checks / test (3.11, locked, ubuntu-latest)	51s
checks / test (3.14, locked, ubuntu-latest)	2m 27s
checks / test (3.13, lowest-direct, ubuntu-latest)	52s
checks / test (3.14, lowest-direct, windows-latest)	2m 29s
checks / test (3.10, locked, ubuntu-latest)	47s
checks / test (3.14, locked, windows-latest)	3m 43s
checks / test (3.10, locked, windows-latest)	2m 22s
checks / test (3.12, locked, ubuntu-latest)	53s
checks / test (3.13, locked, windows-latest)	2m 30s
checks / test (3.10, lowest-direct, windows-latest)	2m 54s
all-green	3s
	41m 37s

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