Drop custom komega package

Using the upstream `komega` package should be good enough for our purposes.
While using a global `context.Background` doesn't integrate nicely with ginkgo/gomega's
context handling. However, we expect client calls to return fast enough in test that
this doesn't really matter.

Author: timebertt

go.mod

@@ -7,7 +7,6 @@ toolchain go1.24.0
 require (
 	github.com/cespare/xxhash/v2 v2.3.0
 	github.com/go-logr/logr v1.4.2
-	github.com/google/go-cmp v0.6.0
 	github.com/google/uuid v1.6.0
 	github.com/hashicorp/go-multierror v1.1.1
 	github.com/onsi/ginkgo/v2 v2.22.2
@@ -54,6 +53,7 @@ require (
 	github.com/google/btree v1.1.3 // indirect
 	github.com/google/cel-go v0.22.0 // indirect
 	github.com/google/gnostic-models v0.6.8 // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
 	github.com/google/gofuzz v1.2.0 // indirect
 	github.com/google/pprof v0.0.0-20241210010833-40e02aabc2ad // indirect
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0 // indirect