Use textDocument/codeLens data in the actions menu when applicable #2 (#26848)

Re-applies what's been reverted in
https://github.com/zed-industries/zed/pull/26832 with an action-related
fix in
64b5d37d32

Before, actions were resolved only if `data` is present and either of
the possible fields is empty:

e842b4eade/crates/project/src/lsp_store.rs (L1632-L1633)

But Zed resolves completions and inlays once, unconditionally, and the
reverted PR applied the same strategy to actions.
That did not work despite the spec not forbidding `data`-less actions to
be resolved.

Soon, it starts to work due to
https://github.com/rust-lang/rust-analyzer/pull/19369 but it seems safer
to restore the original filtering code.

Code lens have no issues with `data`-less resolves:

220d913cbc/crates/rust-analyzer/src/handlers/request.rs (L1618-L1620)

so the same approach as completions and inlays is kept: resolve once.


Release Notes:

- N/A

crates/assistant/src/inline_assistant.rs

@@ -3569,6 +3569,7 @@ impl CodeActionProvider for AssistantCodeActionProvider {
                     title: "Fix with Assistant".into(),
                     ..Default::default()
                 })),
+                resolved: true,
             }]))
         } else {
             Task::ready(Ok(Vec::new()))