filament conflicts with other packages. please allow to use external dependencies

**Describe the bug**
I can't install filament:
```
$ make install
===> Installing for filament-1.25.5
===> Checking if filament is already installed
===> Switching to root credentials for 'install' target
===> Registering installation for filament-1.25.5
Installing filament-1.25.5...
pkg-static: filament-1.25.5 conflicts with zstd-1.5.2 (installs files into the same place). Problematic file: /usr/local/lib/libzstd.a
*** Error code 1
```

It conflicts with the zstd-1.5.2 package that is used by a lot of other important packages,

Please allow to use externally installed zstd.

The same situation is with meshoptimizer and potentially with some other packages.

**To Reproduce**
n/a

**Expected behavior**
n/a

**Screenshots**
/a

**Logs**
n/a

Start by tracing the `make install` path and how Filament packages zstd and meshoptimizer. Determine where external dependencies are selected or bundled, then verify that installation can use the existing zstd-1.5.2 package without file conflicts and that meshoptimizer remains covered.

Written by the indexing model from the issue text.