set catalog feature flag for integration tests (environment-managed)

[mkenigs]

• Copy any tests in environment-managed.bats that are impacted by the catalog and run them with the catalog feature flag set. Make any small changes required to get them passing
• Set FLOX_FEATURES_USE_CATALOG=true and _FLOX_USE_CATALOG_MOCK=/dev/null for all other tests in the file
• If anything that isn't minor breaks, skip copied tests and create followup tickets

[mkenigs]

All of the following tests need to be modified to work with the catalog because they're all performing installs. It would probably be more efficient to not have to perform a full install for every test, but most of the tests are testing behavior across multiple commands (push and pull) so I'm not sure if there's an obvious way to improve that

• m1: install a package to a managed environment
• m2: uninstall a package from a managed environment
• m3: edit a package from a managed environment
• m4: pushed environment can be pulled
• m5: updated environment can be pulled
• m7: remote can not be pulled into diverged environment
• m8: remote can be force pulled into diverged environment
• m11: uses fresh branch after delete
• sanity check upgrade works for managed environments (see catalog.bats for inspiration)