opentelemetry-operator-controller-manager crashlooping after upgrading in RHOCP 4

Issue

• After receiving the upgrade to opentelemetry-operator.v0.74.0-5 the opentelemetry-operator-controller-manager pod has started to crash with the error:

  {"level":"info","ts":"2023-05-11T12:43:06.332498677Z","logger":"controllers.OpenTelemetryCollector","msg":"couldn't determine metrics port from configuration, using 8888 default value","opentelemetrycollector":"collector-system/otel-cluster","error":"missing port in address"}
  {"level":"info","ts":"2023-05-11T12:43:06.356630367Z","msg":"Observed a panic in reconciler: runtime error: invalid memory address or nil pointer dereference","controller":"opentelemetrycollector","controllerGroup":"opentelemetry.io","controllerKind":"OpenTelemetryCollector","OpenTelemetryCollector":{"name":"otel-cluster","namespace":"collector-system"},"namespace":"collector-system","name":"otel-cluster","reconcileID":"1dcd5ff8-4811-4b00-8df3-3d758f2fed3d"}
  panic: runtime error: invalid memory address or nil pointer dereference [recovered]
  panic: runtime error: invalid memory address or nil pointer dereference
  [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x214ddbf]
  goroutine 730 [running]:
  sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Reconcile.func1()
  /remote-source/otelop/deps/gomod/pkg/mod/sigs.k8s.io/controller-runtime@v0.14.5/pkg/internal/controller/controller.go:119 +0x1fa
  panic({0x2604f00, 0x43493a0})
  /usr/lib/golang/src/runtime/panic.go:884 +0x212
  github.com/open-telemetry/opentelemetry-operator/pkg/collector.HorizontalPodAutoscaler({{0x2f45620, 0xc000630c90}, {{0x2f5d438, 0xc00029a750}, 0x0}, {0xc000312410, 0x45}, {0xc0003124b0, 0x49}, {0xc0003125a0, ...}, ...}, ...)
  /remote-source/otelop/app/pkg/collector/horizontalpodautoscaler.go:135 +0xc5f
  github.com/open-telemetry/opentelemetry-operator/pkg/collector/reconcile.HorizontalPodAutoscalers({_, _}, {{0x2f67d88, 0xc000b75260}, {0x2f58520, 0xc000c485c0}, 0xc000a1b180, {{0x2f5d438, 0xc004877ec0}, 0x0}, ...})
  /remote-source/otelop/app/pkg/collector/reconcile/horizontalpodautoscaler.go:41 +0xd8
  github.com/open-telemetry/opentelemetry-operator/controllers.(*OpenTelemetryCollectorReconciler).RunTasks(_, {_, _}, {{0x2f67d88, 0xc000b75260}, {0x2f58520, 0xc000c485c0}, 0xc000a1b180, {{0x2f5d438, 0xc004877ec0}, ...}, ...})
  /remote-source/otelop/app/controllers/opentelemetrycollector_controller.go:223 +0x1d2
  github.com/open-telemetry/opentelemetry-operator/controllers.(*OpenTelemetryCollectorReconciler).Reconcile(0xc000c5e300, {0x2f59798, 0xc004877e90}, {{{0xc000fa21f0, 0x10}, {0xc000fa21e0, 0xc}}})
  /remote-source/otelop/app/controllers/opentelemetrycollector_controller.go:211 +0x3a6
  sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Reconcile(0x2f59798?, {0x2f59798?, 0xc004877e90?}, {{{0xc000fa21f0?, 0x23cffc0?}, {0xc000fa21e0?, 0x0?}}})
  /remote-source/otelop/deps/gomod/pkg/mod/sigs.k8s.io/controller-runtime@v0.14.5/pkg/internal/controller/controller.go:122 +0xc8
  sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).reconcileHandler(0xc00086c320, {0x2f596f0, 0xc000c48500}, {0x2704620?, 0xc000d82080?})
  /remote-source/otelop/deps/gomod/pkg/mod/sigs.k8s.io/controller-runtime@v0.14.5/pkg/internal/controller/controller.go:323 +0x38f
  sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem(0xc00086c320, {0x2f596f0, 0xc000c48500})
  /remote-source/otelop/deps/gomod/pkg/mod/sigs.k8s.io/controller-runtime@v0.14.5/pkg/internal/controller/controller.go:274 +0x1d9
  sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2.2()
  /remote-source/otelop/deps/gomod/pkg/mod/sigs.k8s.io/controller-runtime@v0.14.5/pkg/internal/controller/controller.go:235 +0x85
  created by sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2
  /remote-source/otelop/deps/gomod/pkg/mod/sigs.k8s.io/controller-runtime@v0.14.5/pkg/internal/controller/controller.go:231 +0x333