linux: Use filesystem based unix socket instead of abstract namespace (#12756)

Release Notes:

- N/A

fixes: unable to launch multiple zed instances even if the support dirs
are different(example: bwrap based sandboxing)

crates/cli/Cargo.toml

@@ -19,7 +19,6 @@ path = "src/main.rs"
 [dependencies]
 anyhow.workspace = true
 clap.workspace = true
-libc.workspace = true
 ipc-channel = "0.18"
 once_cell.workspace = true
 release_channel.workspace = true