Add invalid-ignore-comment rule (#15094)

crates/red_knot_python_semantic/resources/mdtest/suppressions/knot-ignore.md

@@ -117,6 +117,7 @@ a = 10 / 0  # knot: ignore[division-by-zero,]
 
 ```py
 # error: [division-by-zero]
+# error: [invalid-ignore-comment] "Invalid `knot: ignore` comment: expected a alphanumeric character or `-` or `_` as code"
 a = 10 / 0  # knot: ignore[*-*]
 ```
 
@@ -138,9 +139,18 @@ future.
 
 ```py
 # error: [unresolved-reference]
+# error: [invalid-ignore-comment] "Invalid `knot: ignore` comment: expected a comma separating the rule codes"
 a = x / 0  # knot: ignore[division-by-zero unresolved-reference]
 ```
 
+## Missing closing bracket
+
+```py
+# error: [unresolved-reference] "Name `x` used when not defined"
+# error: [invalid-ignore-comment] "Invalid `knot: ignore` comment: expected a comma separating the rule codes"
+a = x / 2  # knot: ignore[unresolved-reference
+```
+
 ## Empty codes
 
 An empty codes array suppresses no-diagnostics and is always useless

crates/red_knot_python_semantic/resources/mdtest/suppressions/type-ignore.md

@@ -110,6 +110,7 @@ a = test \
 
 ```py
 # error: [unresolved-reference]
+# error: [invalid-ignore-comment]
 a = test + 2  # type: ignoree
 ```
 

crates/red_knot_python_semantic/src/lib.rs

@@ -3,7 +3,7 @@ use std::hash::BuildHasherDefault;
 use rustc_hash::FxHasher;
 
 use crate::lint::{LintRegistry, LintRegistryBuilder};
-use crate::suppression::{UNKNOWN_RULE, UNUSED_IGNORE_COMMENT};
+use crate::suppression::{INVALID_IGNORE_COMMENT, UNKNOWN_RULE, UNUSED_IGNORE_COMMENT};
 pub use db::Db;
 pub use module_name::ModuleName;
 pub use module_resolver::{resolve_module, system_module_search_paths, KnownModule, Module};
@@ -50,4 +50,5 @@ pub fn register_lints(registry: &mut LintRegistryBuilder) {
     types::register_lints(registry);
     registry.register_lint(&UNUSED_IGNORE_COMMENT);
     registry.register_lint(&UNKNOWN_RULE);
+    registry.register_lint(&INVALID_IGNORE_COMMENT);
 }