This patch adds support for display count info
in volume, backup and snapshot's list&detail APIs
since microversion 3.45, for instance:
1. /v3/{project_id}/volumes?with_count=True
2. /v3/{project_id}/volumes/detail?with_count=True
Depends-On: 1c8fe0ade43da925c5b810ef0cd27817f1c11c7b
Change-Id: I2e92b27c36357120fcf0ec5917c6484441c946a8
Implements: bp add-amount-info-in-list-api