…n load

CL 417576 externalized shouldLoad tracking into a map, which was used to
trigger a reload and cleared once reload completes. Unfortunately, it
overlooked the fact that we may also reload the entire workspace (via
reinitialization). In this case, we should clear newly loaded IDs from
the shouldLoad map, so that they are not subsequently loaded again.

For golang/go#54842
Updates golang/go#54473

Change-Id: I26f49552cae502644142dc4a4e946294db37f6f7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/424074
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
(cherry picked from commit e55fb40)
Reviewed-on: https://go-review.googlesource.com/c/tools/+/428596
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>

This release updates the gopls vulncheck command (which backs the
preview of vulncheck integration in VS Code) with the latest schema
of the Go vulnerability database. See the Vulnerability Management
for Go blog post for more context.

Additionally, this release includes a bugfix for redundant reloads
following go.mod changes (golang/go#54473).