refactor(c)!: Updated include/install paths for adbc.h #350

Job	Run time
check (macOS, adbcdrivermanager) / r-check	1m 22s
check (macOS, adbcflightsql) / r-check	1m 42s
check (macOS, adbcpostgresql) / r-check	1m 31s
check (macOS, adbcsnowflake) / r-check	1m 57s
check (macOS, adbcsqlite) / r-check	1m 33s
check (ubuntu, adbcdrivermanager) / r-check	2m 1s
check (ubuntu, adbcflightsql) / r-check	3m 34s
check (ubuntu, adbcpostgresql) / r-check	2m 3s
check (ubuntu, adbcsnowflake) / r-check	2m 37s
check (windows, adbcdrivermanager) / r-check	4m 55s
check (ubuntu, adbcsqlite) / r-check	2m 25s
check (windows, adbcflightsql) / r-check	6m 29s
check (windows, adbcpostgresql) / r-check	7m 1s
check (windows, adbcsnowflake) / r-check	12m 9s
check (windows, adbcsqlite) / r-check	3m 55s
	55m 14s

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