API / Client code generation / Avoid reserved word (geonetwork#8214)

When using tools to convert OpenAPI to client code eg.

```bash
npx openapi-ts -i ./src/gapi/gapi.json -o src/gapi
```

Some reserved word may create invalid generated code. eg. when building typescript:

```
 TS1102: 'delete' cannot be called on an identifier in strict mode. [
```

services/src/main/java/org/fao/geonet/api/processing/ProcessApi.java

@@ -105,7 +105,7 @@ public List<ProcessingReport> getProcessReport() throws Exception {
     @ResponseBody
     @ResponseStatus(HttpStatus.NO_CONTENT)
     @PreAuthorize("isAuthenticated()")
-    public void delete() throws Exception {
+    public void deleteProcessReport() throws Exception {
         registry.clear();
     }