Re-enable test_server_launch_mode (FuelLabs#5638)

## Description

Closes FuelLabs#5637

## Checklist

- [ ] I have linked to any relevant issues.
- [ ] I have commented my code, particularly in hard-to-understand
areas.
- [ ] I have updated the documentation where relevant (API docs, the
reference, and the Sway book).
- [ ] I have added tests that prove my fix is effective or that my
feature works.
- [ ] I have added (or requested a maintainer to add) the necessary
`Breaking*` or `New Feature` labels where relevant.
- [ ] I have done my best to ensure that my PR adheres to [the Fuel Labs
Code Review
Standards](https://github.com/FuelLabs/rfcs/blob/master/text/code-standards/external-contributors.md).
- [ ] I have requested a review from the relevant team or maintainers.

forc-plugins/forc-debug/tests/fixtures/simple/Forc.toml

@@ -6,4 +6,4 @@ name = "simple"
 implicit-std = false
 
 [dependencies]
-std = { git = "https://github.com/FuelLabs/sway", tag = "v0.50.0" }
+std = { path = "../../../../../sway-lib-std" }

forc-plugins/forc-debug/tests/server_integration.rs

@@ -70,8 +70,6 @@ fn test_server_attach_mode() {
     assert_not_supported_event(output_capture.take_event());
 }
 
-// TODO: re-enable this test once fixed
-#[ignore]
 #[test]
 fn test_server_launch_mode() {
     let output_capture = EventCapture::default();