Please add x_enum_varnames supports for int ENUM

[shurshilov]

I have enum like this openapi
"MyEnum": {
"type": "integer",
"enum": [1, 2],
"title": "MyEnum",
"x_enum_varnames": [
"NEW",
"ACTIVE",
]
},
I expect:
class MyEnum(IntEnum):
NEW = 1
ACTIVE = 2
I get:
class MyEnum(Enum):
integer_1 = 1
integer_2 = 2

the most gallant that the names match
and second I also expect IntEnum (preferably it can be passed with --use-subclass-enum parametr)

[shurshilov]

I found solution x-enum-varnames
there should be hyphens instead of underlines, and the pedantic model should be updated for both

[ilovelinux]

About the specialized Enum, it's related to #1313 and should be fixed with PR #2512 :)