Endless recursion when running make generate for recursive types

### What happened?

I am working on an crossplane-runtime based Elasticsearch provider. One of the things I'd like to automate is the lifecycle of Ingest Pipelines. As you can see in the [docs](https://www.elastic.co/guide/en/elasticsearch/reference/master/ingest.html) there is a recursive "on_failure" element to the API call.

An example of a real, even more nested ingest pipeline:

```
"processors": [
{
"rename": {
"description": "Rename 'provider' to 'my.field'",
"field": "field",
"target_field": "my.field",
"on_failure": [
{
"set": {
"description": "Set 'error.message'",
"field": "error.message",
"value": "Field 'field' does not exist. Cannot rename to 'my.field'",
"override": false,
"on_failure": [
{
"set": {
"description": "Set 'error.message.multi'",
"field": "error.message.multi",
"value": "Document encountered multiple ingest errors",
"override": true
}
}
]
}
}
]
}
}
]
```
### How can we reproduce it?

An example with some irrelevant fields omitted:

```
type OpensearchIndexPipelineSpec struct {
xpv1.ResourceSpec `json:",inline"`
Description string `json:"description"`
Version int64 `json:"version"`
Processors []*PipelineProcessorSpec `json:"processors"`
}

type PipelineProcessorSpec struct {
Set *SetProcessorSpec `json:"set,omitempty"`
Rename *RenameProcessorSpec `json:"rename,omitempty"`
}

type SetProcessorSpec struct {
Field string `json:"field,omitempty"`
Value string `json:"value,omitempty"`
Description string `json:"description,omitempty"`
Override bool `json:"override,omitempty"`
OnFailure []PipelineProcessorSpec `json:"on_failure,omitempty"`
}

type RenameProcessorSpec struct {
Field string `json:"field,omitempty"`
TargetField string `json:"target_field,omitempty"`
OnFailure []PipelineProcessorSpec `json:"on_failure,omitempty"`
}
```
run make generate

The generation will fail due to endless recursion in https://github.com/crossplane/crossplane-tools/blob/master/internal/types/types.go#L89

### What environment did it happen in?
crossplane-provider template tip

I have a patch ready and will send it shortly.

Cheers