feat: C++ Client Helpers #952

Job	Run time
check (ubuntu, adbcdrivermanager) / r-check	2m 39s
check (ubuntu, adbcflightsql) / r-check	3m 37s
check (ubuntu, adbcpostgresql) / r-check	2m 26s
check (ubuntu, adbcsnowflake) / r-check	2m 50s
check (ubuntu, adbcsqlite) / r-check	2m 17s
	13m 49s

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