IntEnum literals are not considerable comparable with ints

Bug Report

The handling of types for IntEnum literals shows no overlap with int literals.
The handling for int variables appears to be correct,

To Reproduce

playground

from enum import IntEnum


class CardVal(IntEnum):
    VAL_A = 1
    VAL_2 = 2

try:
    assert CardVal.VAL_A == 1
except AssertionError:
    pass # So we see the second error in mypy

assert CardVal.VAL_2 == 2

Expected Behavior

The type of CardVal.VAL_A gets erased to something considered comparable to Literal[1]

Actual Behavior

From the playground link, using python 3.10 / mypy 1.6.1:

main.py:9: error: Non-overlapping equality check (left operand type: "Literal[CardVal.VAL_A]", right operand type: "Literal[1]")  [comparison-overlap]
main.py:13: error: Non-overlapping equality check (left operand type: "Literal[CardVal.VAL_2]", right operand type: "Literal[2]")  [comparison-overlap]
Found 2 errors in 1 file (checked 1 source file)

The same behaviour has been seen locally with python 3.11 / mypy 1.6.1

Inizia dalla riproduzione collegata in mypy playground usando Python 3.10 e strict mode, quindi traccia il modo in cui vengono gestiti i literal IntEnum e i confronti di uguaglianza. Il lavoro è completo quando i confronti tra i membri IntEnum mostrati e i literal int corrispondenti non producono più comparison-overlap errors, mentre il comportamento esistente delle variabili int rimane corretto.