Published tor-expert-bundle tar.gz files should not include their tor-browser-build build id

Currently tor-expert-bundles have filenames like tor-expert-bundle-tbb-nightly.2022.10.17-linux-i686-00347a.tar.gz or tor-expert-bundle-12.0a3-windows-i686-abcdef.tar.gz.

This sucks a bit for downstream build integration since instead of being able to download something like http://www.torstuff.com/builds/tor-expert-bundle-$version-$platform.tar.gz you also have to specify the per-platform build id as well.

We should update the copy step in projects/browser/build and browser/projects/build.android to strip out this hash since the tar.gz will live in the browser output directory which already has a unique build id.