[api] OPSAPS-33039 CM API support for collecting global diag bundle for a certain time range
[api] OPSAPS-33039 CM API support for collecting global diag bundle for a certain time range

Adding start_time parameter to collect diagnostics data. Valid since v13.

Testing done:
make test
make dist

cloudera/cm_api,cloudera/cm_api,cloudera/cm_api