Automatic merge from submit-queue (batch tested with PRs 48552, 51876)

Disable default paging in list watches

For 1.8 this will be off by default. In 1.9 it will be on by default.
Add tests and rename some fields to use the `chunking` terminology.

Note that the pager may be used for other things besides chunking.

Follow on to #48921, we left the field on to get some exercise in the normal code paths, but needs to be disabled for 1.8.

@liggitt let's merge on wednesday.