(🐞) Column marker for `for` target is wrong, it's where the `for` keyword is, not where the target is

from typing import Any

b: Any
for a in b:
    ...

if True:
    for a in b:
        ...

Expected

> mypy test.py
test.py:4:5: error: Expression has type "Any"  [no-any-expr]
    for a in b:
        ^
test.py:8:9: error: Expression has type "Any"  [no-any-expr]
        for a in b:
            ^
Found 2 errors in 1 file (checked 1 source file)

Actual

> mypy test.py
test.py:4:1: error: Expression has type "Any"  [no-any-expr]
    for a in b:
    ^
test.py:8:5: error: Expression has type "Any"  [no-any-expr]
        for a in b:
        ^
Found 2 errors in 1 file (checked 1 source file)

Reproduce the issue with the Python snippet and compare the reported caret positions for both top-level and nested for loops. Trace the diagnostic location handling for the for target, then verify that the caret points under the target expression in both cases.