Fixes #12585

This changes the expectations for installed binaries on linux based on
work
that @jirutka has done for Alpine.

In particular, we now put the cli in place as `bin/zed` and the zed
binary as
`libexec/zed-editor`, and assume that packagers do the same.

cc @someone13574

Release notes:

- N/A

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Co-authored-by: Mikayla <mikayla@zed.dev>