chore(katana): ignore forked backend thread spawn test

[kariy]

Description

ignore test that checks if the backend thread is spawned or not, for now, as we have made sure (since #1944) that the thread will always be spawned when creating a new Backend:

dojo/crates/katana/storage/provider/src/providers/fork/backend.rs

Lines 140 to 157 in 628542f

	pub fn new(provider: P, block_id: BlockHashOrNumber) -> Result<BackendHandle, BackendError> {
	let (handle, backend) = Self::new_inner(provider, block_id);
	thread::Builder::new()
	.name("forking-backend".into())
	.spawn(move || {
	tokio::runtime::Builder::new_current_thread()
	.enable_all()
	.build()
	.expect("failed to create tokio runtime")
	.block_on(backend);
	})
	.map_err(BackendError::BackendThreadInit)?;
	info!(target: LOG_TARGET, "Forking backend started.");
	Ok(handle)
	}

currently the test is passing due to an error that was not being expected from the test. what the test was meant to do is to test that an error should happen if the BackendHandle is being used while the Backend is nonexistant/dropped.

but because the recent refactor in #1944, the end goal is to separate the thread spawning entirely out of the creation of the Backend. so that we can let the api consumer to handle how to drive the Backend future forward.

Related issue

Tests

• Yes
• No, because they aren't needed
• No, because I need help

Added to documentation?

• README.md
• Dojo Book
• No documentation needed

Checklist

• I've formatted my code (scripts/prettier.sh, scripts/rust_fmt.sh, scripts/cairo_fmt.sh)
• I've linted my code (scripts/clippy.sh, scripts/docs.sh)
• I've commented my code
• I've requested a review after addressing the comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.78%. Comparing base (de3b2e5) to head (5376514).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1977      +/-   ##
==========================================
- Coverage   69.80%   69.78%   -0.02%     
==========================================
  Files         313      313              
  Lines       35526    35527       +1     
==========================================
- Hits        24798    24793       -5     
- Misses      10728    10734       +6     

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[glihm]

Thanks for this fix mate. 🙏