The annotations map should use an enum to indicate expected values. For
now, we reuse the EnumValues to expose the information in the settings.
Later, we'll create a separate EnumKeys field to expose this information
more correctly.
Also, adjust some of the logic that applies the settings because it was
incorrect.
Both gopls/doc/settings.md and internal/lsp/source/api_json.go are
generated files.
Updates golang/go#42961
Change-Id: Ifb032b70caaae73defe9a540df20d098d313e68e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/280354
Trust: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Peter Weinberger <pjw@google.com>