Update linux binary expectations (#12622)

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

---------

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

crates/zed/Cargo.toml

@@ -11,7 +11,7 @@ authors = ["Zed Team <hi@zed.dev>"]
 workspace = true
 
 [[bin]]
-name = "Zed"
+name = "zed"
 path = "src/main.rs"
 
 [dependencies]