refactor(c)!: Updated include/install paths for adbc.h #296

Job	Run time
check (macOS, adbcflightsql) / r-check	1m 52s
check (macOS, adbcdrivermanager) / r-check	1m 56s
check (macOS, adbcpostgresql) / r-check	1m 43s
check (macOS, adbcsnowflake) / r-check	2m 10s
check (macOS, adbcsqlite) / r-check	1m 33s
check (ubuntu, adbcdrivermanager) / r-check	2m 44s
check (ubuntu, adbcflightsql) / r-check	3m 33s
check (ubuntu, adbcpostgresql) / r-check	2m 6s
check (ubuntu, adbcsnowflake) / r-check	3m 8s
check (ubuntu, adbcsqlite) / r-check	2m 3s
check (windows, adbcdrivermanager) / r-check	3m 49s
check (windows, adbcflightsql) / r-check	4m 32s
check (windows, adbcpostgresql) / r-check	4m 33s
check (windows, adbcsnowflake) / r-check	4m 33s
check (windows, adbcsqlite) / r-check	4m 17s
	44m 32s

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