Build: Exclude non-minified VIPS files from grunt module copy.

Add an exclusion for non-minified VIPS files to match the existing filter in `tools/gutenberg/copy.js`. This prevents ~16 MB `worker.js` from being copied alongside the nearly identically-sized `worker.min.js`.

Props adamsilverstein, zieladam, desrosj.
Fixes #64884.



git-svn-id: https://develop.svn.wordpress.org/trunk@62055 602fd350-edb4-49c9-b593-d223f7449a82