fix(client): unmask connection errors in ClientSessionGroup teardown (#915) #1958

Job	Run time
checks / pre-commit	32s
checks / readme-snippets	14s
checks / test (3.11, lowest-direct, ubuntu-latest)	52s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 2s
checks / test (3.10, locked, windows-latest)	2m 29s
checks / test (3.10, locked, ubuntu-latest)	51s
checks / test (3.11, locked, ubuntu-latest)	54s
checks / test (3.10, lowest-direct, windows-latest)	2m 48s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 3s
checks / test (3.12, lowest-direct, windows-latest)	3m 45s
checks / test (3.12, locked, windows-latest)	3m 23s
checks / test (3.11, locked, windows-latest)	2m 39s
checks / test (3.13, lowest-direct, ubuntu-latest)	57s
checks / test (3.12, locked, ubuntu-latest)	54s
checks / test (3.13, locked, ubuntu-latest)	50s
checks / test (3.11, lowest-direct, windows-latest)	2m 53s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 18s
checks / test (3.14, lowest-direct, windows-latest)	2m 29s
checks / test (3.14, locked, ubuntu-latest)	2m 26s
checks / test (3.14, locked, windows-latest)	2m 55s
checks / test (3.13, locked, windows-latest)	2m 30s
checks / test (3.13, lowest-direct, windows-latest)	2m 53s
all-green	5s
	40m 42s

Provide feedback