golangci-lint: ignore deprecation notices in gRPC pkg

Those have been fixed on the main branch, let's ignore them safely on
the stable branch.

Signed-off-by: Mahe Tardy <mahe.tardy@gmail.com>

.golangci.yml

@@ -50,3 +50,8 @@ issues:
     # The file gets prefixed with "Code generated by cmd/cgo; DO NOT EDIT."
     - linters: [goheader]
       path: pkg/sensors/tracing/genericuprobe_cgo.go
+    # Ignoring grpc.DialContext and grpc.WithBlock deprecation on a stable branch
+    - linters: [staticcheck]
+      text: "SA1019: grpc.DialContext is deprecated: use NewClient instead.  Will be supported throughout 1.x."
+    - linters: [staticcheck]
+      text: "SA1019: grpc.WithBlock is deprecated: this DialOption is not supported by NewClient. Will be supported throughout 1.x."