docs: add loading data from Firestore backup sample#737

Merged

gcf-merge-on-green[bot] merged 8 commits intogoogleapis:masterfrom tswast:DATASTORE_BACKUP-sample

Jul 16, 2021

+94-26

Commits on Jul 2, 2021

feat: add LoadJobConfig.projection_fields to select DATASTORE_BACKUP fields
tswast
committed
docs: add loading data from Firestore backup sample
tswast
committed

Commits on Jul 14, 2021

Commits on Jul 15, 2021

Commits on Jul 16, 2021

remove unnecessary random_table
tswast
committed