all: update golang.org/x dependencies

Update golang.org/x dependencies to their latest versions.

Leave out 'go get golang.org/x/exp/event@upgrade' from this change
because including it causes errors. Filed golang/go#74596 for that,
and it can be handled independently.

Also leave out 'go get golang.org/x/exp@upgrade'. This module uses
an older version of golang.org/x/exp/slog, and so upgrading to its
latest version (or to the final log/slog API) involves resolving a
few breaking API changes. This too is best to do independently.

[git-generate]
go get golang.org/x/mod@v0.26.0 golang.org/x/net@v0.42.0 golang.org/x/oauth2@v0.30.0 golang.org/x/sync@v0.16.0 golang.org/x/tools@v0.35.0 golang.org/x/crypto@v0.40.0 golang.org/x/sys@v0.34.0 golang.org/x/text@v0.27.0 golang.org/x/time@v0.12.0 golang.org/x/telemetry@upgrade golang.org/x/xerrors@upgrade golang.org/x/vuln@upgrade golang.org/x/exp/typeparams@upgrade
go mod tidy

Change-Id: I9e6ee0cce5d65dec6d5d57328308183295f8fd11
Reviewed-on: https://go-review.googlesource.com/c/pkgsite-metrics/+/687695
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@google.com>