ci: bump to golangci-lint v2.0

The new configuration file was initially generated by golangci-lint
migrate, when tweaked to minimize and simplify.

golangci-lint v2 switches to a new version of staticcheck which shows
much more warnings. Some of them were fixed by a few previous commits,
and the rest of them are disabled.

In particular, ST1005 had to be disabled (an attempt to fix it was made
in https://github.com/opencontainers/runc/pull/3857 but it wasn't
merged).

Also, golangci-extra was modified to include ALL staticcheck linters.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit 127e8e68d3)
Signed-off-by: lifubang <lifubang@acmcoder.com>

.github/workflows/validate.yml

@@ -38,9 +38,9 @@ jobs:
         run: |
           sudo apt -q update
           sudo apt -qy install libseccomp-dev
-      - uses: golangci/golangci-lint-action@v6
+      - uses: golangci/golangci-lint-action@v7
         with:
-          version: v1.64
+          version: v2.0
       # Extra linters, only checking new code from a pull request.
       - name: lint-extra
         if: github.event_name == 'pull_request'