MM-37186: Update dependencies (#18604)

* MM-37186: Update dependencies

The split client libraries were excluded from being upgraded.

See: https://github.com/splitio/go-split-commons/issues/56

https://mattermost.atlassian.net/browse/MM-37186

```release-note
NONE
```

* Ignore staticcheck deprecation warnings

```release-note
NONE
```

app/plugin_signature.go

@@ -11,8 +11,8 @@ import (
 	"path/filepath"
 
 	"github.com/pkg/errors"
-	"golang.org/x/crypto/openpgp"
-	"golang.org/x/crypto/openpgp/armor"
+	"golang.org/x/crypto/openpgp"       //nolint:staticcheck
+	"golang.org/x/crypto/openpgp/armor" //nolint:staticcheck
 
 	"github.com/mattermost/mattermost-server/v6/model"
 	"github.com/mattermost/mattermost-server/v6/shared/mlog"