Circular dependency between lal.utils.cache and python-ligo-lw prevents make check -C bin in Conda builds

There is a circular dependency between lal.utils.cache (which uses ligo.lw.lsctables in lal/python/lal/utils/cache.py line 321) and python-ligo-lw (which depends on lal).

This code with the circular dependency is exercised by make check -C bin in LAL, which runs bin/test_path2cache. The Conda packages currently doesn't run this code, since make check is only run when Python is disabled. But @duncanmmacleod has suggested (!1904 (comment 574217)) adding make check -C bin to install-bin.sh which would then run this code.

A naive attempt from me at doing this failed, because adding python-ligo-lw as a host/run dependency for the lal subpackage failed with a conflicting exact pin error. Presumably python-ligo-lw is trying to get its upstream lal dependency which conflicts with the lal package being built. (This appears not to be an issue with the Debian and RHEL builds.)

The solution is either to resolve the circular dependency in lal.utils.cache, or perhaps there's a smarter way to add python-ligo-lw as a dependency which avoids the conflicting exact pin error.

If this can be fixed, then make check -C bin could then be added to conda/install-bin.sh. (For !1904 (merged) I've implemented this only for LALPulsar in lalpulsar/conda/install-bin.sh, which is no longer a symlink to conda/install-bin.sh.)