Reuse connections across test suite #991

Job	Run time
check-labels / Check labels	4s
JNI macOS	9m 0s
ODBC AMD64 Ubuntu Debug	30m 26s
ODBC Windows	24m 20s
JNI ubuntu-24.04-arm arm64v8	1m 11s
ODBC AMD64 Ubuntu Release	37m 32s
JNI ubuntu-latest amd64	2m 30s
AMD64 Alpine Linux	9m 9s
ODBC debug AMD64 macOS 15-intel	13m 24s
ODBC debug ARM64 macOS 14	24m 49s
AMD64 Debian C++23	7m 40s
AMD64 Ubuntu Meson	3m 24s
ODBC release AMD64 macOS 15-intel	18m 23s
ODBC release ARM64 macOS 14	7m 52s
ARM64 Windows 11 MSVC / windows	21m 36s
ODBC Windows Upload Unsigned DLL	0s
Upload Unsigned ODBC DLL	0s
ODBC Windows Upload Unsigned MSI	0s
ODBC nightly	-1s
report-extra-cpp	0s
	3h 31m 19s

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