debugger: More tidy up for SSH (#28993)

Split `locator` out of DebugTaskDefinition to make it clearer when
location needs to happen.

Release Notes:

- N/A

---------

Co-authored-by: Anthony Eid <hello@anthonyeid.me>
Co-authored-by: Anthony <anthony@zed.dev>
Co-authored-by: Cole Miller <m@cole-miller.net>

crates/project/src/debugger.rs

@@ -14,7 +14,7 @@
 pub mod breakpoint_store;
 pub mod dap_command;
 pub mod dap_store;
-mod locator_store;
+pub mod locators;
 pub mod session;
 
 #[cfg(any(feature = "test-support", test))]