[syntax-errors] Detect single starred expression assignment x = *y (#17624)

## Summary

Part of #17412

Starred expressions cannot be used as values in assignment expressions.
Add a new semantic syntax error to catch such instances.
Note that we already have
`ParseErrorType::InvalidStarredExpressionUsage` to catch some starred
expression errors during parsing, but that does not cover top level
assignment expressions.

## Test Plan

- Added new inline tests for the new rule
- Found some examples marked as "valid" in existing tests (`_ = *data`),
which are not really valid (per this new rule) and updated them
- There was an existing inline test - `assign_stmt_invalid_value_expr`
which had instances of `*` expression which would be deemed invalid by
this new rule. Converted these to tuples, so that they do not trigger
this new rule.

crates/ruff_python_parser/src/parser/statement.rs

@@ -1127,10 +1127,10 @@ impl<'src> Parser<'src> {
         // a + b
 
         // test_err assign_stmt_invalid_value_expr
-        // x = *a and b
-        // x = *yield x
-        // x = *yield from x
-        // x = *lambda x: x
+        // x = (*a and b,)
+        // x = (42, *yield x)
+        // x = (42, *yield from x)
+        // x = (*lambda x: x,)
         // x = x := 1
 
         let mut value =