Add gazelle overrides to enable building rclone (#1933)

I was just toying around with Gazelle and the rclone project (see
rclone/rclone#8093). These changes were
necessary, but not sufficient, to build `//:rclone` with
Gazelle-generated BUILD files.

I also needed to make a change for hdfs in my MODULE.bazel, but someone
already beat me to it in
#1867. I solved my
problem with `gazelle:proto legacy`, but it looks like the existing
override does something different.


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**What type of PR is this?**

> Uncomment one line below and remove others.
>
> Bug fix
> Feature
> Documentation

Other

**What package or component does this PR mostly affect?**

> For example:
>
> language/go
> cmd/gazelle
> go_repository
> all

bzlmod

**What does this PR do? Why is it needed?**

Adds default overrides for some Go dependencies of the rclone project.

**Which issues(s) does this PR fix?**

Fixes #

**Other notes for review**

internal/bzlmod/default_gazelle_overrides.bzl

@@ -102,10 +102,23 @@ DEFAULT_DIRECTIVES_BY_PATH = {
         "gazelle:go_generate_proto false",
         "gazelle:proto_import_prefix k8s.io/apimachinery",
     ],
+    "storj.io/common": [
+        "gazelle:proto legacy",
+    ],
+    "storj.io/eventkit": [
+        "gazelle:proto legacy",
+    ],
+    "storj.io/picobuf": [
+        "gazelle:proto legacy",
+    ],
 }
 
 DEFAULT_BUILD_EXTRA_ARGS_BY_PATH = {
     "github.com/census-instrumentation/opencensus-proto": [
         "-exclude=src",
     ],
+    "github.com/cronokirby/saferith": [
+        # This test file declares `package big` rather than `package saferith`.
+        "-exclude=arith_s390x_test.go",
+    ],
 }