feat: add api to gooddata-sdk for agg fact#1087

fiedlr merged 2 commits intogooddata:mastergooddata/gooddata-python-sdk:masterfrom

fiedlr:afi-cq-1236-new-preagg-dataset-endpointsfiedlr/gooddata-python-sdk:afi-cq-1236-new-preagg-dataset-endpointsCopy head branch name to clipboard