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
 ```