Remove hardcoded `workspace_refresh` client capability

[dhruvmanila]

Resolve the following todo:

ruff/crates/ruff_server/src/session/capabilities.rs

Lines 40 to 51 in bcd9443

	let workspace_refresh = true;
	// TODO(jane): Once the bug involving workspace.diagnostic(s) deserialization has been fixed,
	// uncomment this.
	/*
	let workspace_refresh = client_capabilities
	.workspace
	.as_ref()
	.and_then(|workspace| workspace.diagnostic.as_ref())
	.and_then(|diagnostic| diagnostic.refresh_support)
	.unwrap_or_default();
	*/

This should address #10581 (comment).

[dhruvmanila]

So, the PR hasn't been merged yet in the original repository: gluon-lang/lsp-types#281 but our forked version does contain this fix which we're using.