Refs #31949 -- Made @sensitive_variables and @sensitive_post_parameters work with async functions

[LomaxOnTheRun]

Reference to #31949.

This PR makes the sensitive_variables and sensitive_post_parameters decorators able to handle both sync and async views.

[felixxm]

@LomaxOnTheRun Unfortunately, it's much more complicated, see 23cbed2 which was reverted 7330408, and a new PR from Jon.

[bigfootjon]

@LomaxOnTheRun if you can figure out a solution to the problem with my original PR (and my attempt to solve it in the new PR) then I'm all ears!

Basically, write a test case that uses @sensitive_variables on a nested async function and have the nested async function throw. In this case the sensitive variables will not be hidden :/

E.g.:

@sensitive_variables("sauce")
@sensitive_post_parameters("bacon-key", "sausage-key")
async def async_sensitive_function(request):
    # Do not just use plain strings for the variables' values in the code
    # so that the tests don't return false positives when the function's source
    # is displayed in the exception report.
    cooked_eggs = "".join(["s", "c", "r", "a", "m", "b", "l", "e", "d"])  # NOQA
    sauce = "".join(  # NOQA
        ["w", "o", "r", "c", "e", "s", "t", "e", "r", "s", "h", "i", "r", "e"]
    )
    raise Exception


async def async_sensitive_view_nested(request):
    try:
        await async_sensitive_function(request)
    except Exception:
        exc_info = sys.exc_info()
        send_log(request, exc_info)
        return technical_500_response(request, *exc_info)