Serializer type conversion not respected

[benedikt-bartscher]

Describe the bug

Reflex has builtin serializers for a lot of classes like f.e. datetime and date which serialize to a str.
This should ideally set _var_is_string to affected vars automatically

related pr: #3227

To Reproduce
Steps to reproduce the behavior:

from datetime import date
import reflex as rx

class CC(rx.Component):
    tag = "cc"
    dob: rx.Var[date]

cc = CC.create

today_var = rx.Var.create(date.today())
# this fixes it
# today_var._var_is_string = True

def index() -> rx.Component:
    return cc(dob=today_var)

app = rx.App()
app.add_page(index)

Results in the following Frontend error:

./pages/index.js
Error: 
  x Legacy octal escape is not permitted in strict mode
    ,-[/home/bb/dev/reflex/test-optional/.web/pages/index.js:13:1]
 13 |     <Fragment>
 14 |   <RadixThemesFlex align={`start`} className={`rx-Stack`} direction={`column`} gap={`3`}>
 15 |   <cc/>
 16 |   <cc dob={2024-05-03}/>
    :                 ^^
 17 | </RadixThemesFlex>
 18 |   <NextHead>
 19 |   <title>
    `----

Expected behavior
passing a datetime as prop just works without manual _var_is_string fixups

Specifics (please complete the following information):

• Python Version: 3.12.3
• Reflex Version: main branch
• OS: arch
• Browser (Optional): ---

[benedikt-bartscher]

Some hacky workaround refs:
https://github.com/reflex-dev/reflex/blob/main/reflex/components/core/cond.py#L166
https://github.com/reflex-dev/reflex/blob/main/reflex/components/core/match.py#L70
https://github.com/reflex-dev/reflex/blob/main/reflex/components/core/match.py#L122
https://github.com/reflex-dev/reflex/blob/main/reflex/event.py#L199
https://github.com/reflex-dev/reflex/blob/main/reflex/event.py#L272
https://github.com/reflex-dev/reflex/blob/main/reflex/event.py#L464