Add support for info module to describe GCP Secret Manager - List secrets and versions metadata

##### SUMMARY

Add support for info module to describe GCP Secret Manager to list secrets and versions metadata

**NOTE**: The intention is not to list the secret payloads - it is only for listing metadata.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME

module: `gcp_secretmanager_info`

##### ADDITIONAL INFORMATION

This info module can be used to obtain a list of secrets and the associated versions metadata in a GCP Project.

```yaml
- hosts: localhost
vars:
project_number: 111111111111
auth_kind: application
tasks:
- name: List secrets info
gcp_secretmanager_info:
project: '{{ project_id }}'
auth_kind: '{{ auth_kind }}'
register: reg_secrets_info

- name: Print secrets metadata
debug:
var: reg_secrets_info
```

Start from the proposed gcp_secretmanager_info module and the YAML playbook in the issue. Define the returned shape for secret and version metadata, verify that secret payloads are excluded, and check the result against a GCP project containing secrets and versions.

Written by the indexing model from the issue text.