Annotations in services code for envvars seem to be broken

When running `grep -rn deprecationVersion` + `make -C docs docs-generate`, the resulting `env_vars.yaml` does not contain deprecation version for the following:

```bash
clientlog/pkg/config/config.go:23: RevaGateway string `yaml:"reva_gateway" env:"OCIS_REVA_GATEWAY;CLIENTLOG_REVA_GATEWAY" desc:"CS3 gateway used to look up user metadata" introductionVersion:"5.0" deprecationVersion:"6.0" removalVersion:"%%NEXT_PRODUCTION_VERSION%%" deprecationInfo:"CLIENTLOG_REVA_GATEWAY removed for simplicity."`
[...]
collaboration/pkg/config/cs3api.go:14: Name string `yaml:"name" env:"OCIS_REVA_GATEWAY;COLLABORATION_CS3API_GATEWAY_NAME" desc:"CS3 gateway used to look up user metadata." introductionVersion:"6.0.0" deprecationVersion:"6.0" removalVersion:"%%NEXT_PRODUCTION_VERSION%%" deprecationInfo:"COLLABORATION_CS3API_GATEWAY_NAME removed for simplicity."`
```