[Temporal] Remove v8 staging test plain-date-time-with

The tests in `test/staging/Temporal/v8/plain-date-time-with.js` are covered by tests in
- `test/built-ins/Temporal/PlainDateTime/prototype/with/branding.js`
- `test/built-ins/Temporal/PlainDateTime/prototype/with/argument-not-object.js`
      --> add NaN
- `test/built-ins/Temporal/PlainDateTime/prototype/with/infinity-throws-rangeerror.js`
- `test/built-ins/Temporal/PlainDateTime/prototype/with/calendar-temporal-object-throws.js`
      --> add Now constructs as values
- `test/built-ins/Temporal/PlainDateTime/prototype/with/options-wrong-type.js`
- `test/built-ins/Temporal/PlainDateTime/prototype/with/calendar-throws.js`
- `test/built-ins/Temporal/PlainDateTime/prototype/with/timezone-throws.js`
- `test/built-ins/Temporal/PlainDateTime/prototype/with/basic.js`

Author: ioannad

test/built-ins/Temporal/PlainDateTime/prototype/with/argument-not-object.js

@@ -16,6 +16,7 @@ const args = [
   Symbol(),
   2020,
   2020n,
+  NaN,
 ];
 for (const argument of args) {
   assert.throws(TypeError, () => instance.with(argument), `Does not support ${typeof argument}`);

test/built-ins/Temporal/PlainDateTime/prototype/with/calendar-temporal-object-throws.js

@@ -16,6 +16,9 @@ const values = [
   Temporal.PlainTime.from("15:19:45"),
   Temporal.PlainYearMonth.from("2022-04"),
   Temporal.ZonedDateTime.from("2022-04-12T15:19:45[UTC]"),
+  Temporal.Now.plainDateTimeISO(),
+  Temporal.Now.plainDateISO(),
+  Temporal.Now.plainTimeISO(),
 ];
 
 for (const value of values) {