Normative: Partial stack of removals

[ptomato]

Here is an implementation of part of the slate of API removals that reached consensus in the TC39 meeting of 2024-06-12. This consists of all removals except for calendars and time zones and things related to them such as getISOFields, which will follow in a later PR.

This PR contains documentation updates, removals from the spec text, removals from the reference code, removals from the suggested TypeScript definitions, and adjustments of the cookbook examples.

Here is what's removed exactly:

• Temporal.PlainDateTime.p.withPlainDate
• Temporal.ZonedDateTime.p.withPlainDate
• Temporal.PlainTime.p.toPlainDateTime
• Temporal.PlainTime.p.toZonedDateTime
• Temporal.Instant.fromEpochSeconds
• Temporal.Instant.fromEpochMicroseconds
• Temporal.Instant.p.epochSeconds
• Temporal.Instant.p.epochMicroseconds
• Temporal.ZonedDateTime.p.epochSeconds
• Temporal.ZonedDateTime.p.epochMicroseconds
• Temporal.PlainDateTime.p.toPlainYearMonth
• Temporal.PlainDateTime.p.toPlainMonthDay
• Temporal.ZonedDateTime.p.toPlainYearMonth
• Temporal.ZonedDateTime.p.toPlainMonthDay
• Temporal.Instant.p.toZonedDateTime
• Temporal.Now.zonedDateTime
• Temporal.Now.plainDateTime
• Temporal.Now.plainDate

Tests are in tc39/test262#4108.

Closes: #2846, #2847, #2848, #2849

[ptomato]

Thanks for the quick review. (Note, this was also already reviewed by other Temporal champions while on the branch that was shared in the TC39 presentation.)