pass retry configuration to each next_page in Pager calls

[daniel-sanche]

We have three rpcs that use pagers: ListDocuments, ListCollectionIds, and PartitionQuery

Currently, retry and timeout values can be passed in to all 3, but it is only used in the initial call. When the next_page call is made, it uses API default values for these fields

This should be addressed at the gapic-generator level. See googleapis/gapic-generator-python#1974

[daniel-sanche]

This was fixed upstream in googleapis/gapic-generator-python#2065, merged into firestore as part of #919, and released as part of https://github.com/googleapis/python-firestore/releases/tag/v2.17.2