doc/go1.18: catch up with runtime/compiler commits and API changes
doc/go1.18: catch up with runtime/compiler commits and API changes

For #47694.

Change-Id: I21b1af1807d4da2fb2f4d9b961d44a21d715d7d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/369155
Trust: Austin Clements <7ea35d812706d9213868749011af1ed4fa2f6aa0@google.com>
Trust: Jeremy Faller <b3f594e10a9edcf5413cf1190121d45078c62290@golang.org>
Reviewed-by: Jeremy Faller <b3f594e10a9edcf5413cf1190121d45078c62290@golang.org>

CAFxX/go,nawawi/go,golang/go,cloudflare/go,nawawi/go,golang/go,nawawi/go,CAFxX/go,nawawi/go,nawawi/go,cloudflare/go,nawawi/go,golang/go,CAFxX/go,nawawi/go,cloudflare/go,golang/go,golang/go,CAFxX/go,cloudflare/go,CAFxX/go,golang/go,nawawi/go,cloudflare/go,golang/go,golang/go,CAFxX/go,cloudflare/go,CAFxX/go,cloudflare/go,CAFxX/go,cloudflare/go