workspace: rules_go, gazelle, go, gVisor update

This commit not only updates rules_go and friends, but also updates
gVisor, removes legacy protobuf usage and switches from using
build_configuration to a config flag for bazel

Change-Id: Idb383f35ca0fec4cb7329e9d991f08f28cf9b1fb
Reviewed-on: https://review.monogon.dev/c/monogon/+/2129
Tested-by: Jenkins CI
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
diff --git a/README.md b/README.md
index 00a6945..34c51d3 100644
--- a/README.md
+++ b/README.md
@@ -23,11 +23,11 @@
 
 Build CLI and node image:
 
-    bazel build //metropolis/cli/dbg //:launch -c dbg
+    bazel build //metropolis/cli/dbg //:launch --config dbg
 
 Launch an ephemeral test node:
 
-    bazel test //:launch -c dbg --test_output=streamed
+    bazel test //:launch --config dbg --test_output=streamed
     
 Run a kubectl command while the test is running:
 
@@ -37,4 +37,4 @@
 
 Run full test suite:
 
-    bazel test -c dbg //...
+    bazel test --config dbg //...