BUILD: introduce BUILD_ACM macro

CMakeLists.txt

conanfile.py

include/CMakeLists.txt

include/caosdb/acm/permission_rule.h

include/caosdb/acm/role.h

include/caosdb/acm/user.h

include/caosdb/connection.h

src/CMakeLists.txt

src/caosdb/connection.cpp

test/CMakeLists.txt

test/test_connection.cpp

test_package/CMakeLists.txt

test_package/conanfile.py

test_package/test_info.cpp