Increase augment-vis saved obj limits on a dashboard

[ohltyler]

By default, the saved object loader findAll() has a limit of 100 objects and doesn't implement pagination, as that is an open/incomplete item on OSD side. Because of this, there is a default limitation of 100 objects (associations) that we can show on a given dashboard when all of them are fetched.

Saved object loader findAll(): https://github.com/opensearch-project/OpenSearch-Dashboards/blob/main/src/plugins/saved_objects/public/saved_object/saved_object_loader.ts#L122-L147
Augment vis saved object loader findAll() (just a super call): https://github.com/opensearch-project/OpenSearch-Dashboards/blob/main/src/plugins/vis_augmenter/public/saved_augment_vis/saved_augment_vis.ts#L85-L97

A few options to improve this:

1. Add other search fields to findAll() call so we only fetch the objs for a particular vis ID. This is because right now, we are making this call for each visualization, fetching all of the same objs, and then doing post-filtering to only include ones that match the vis ID. This is inefficient and adds unnecessary network load
2. Increase the base size limit of 100 to something larger. Depending on what we want to support per visualization, and if the first option is completed first, perhaps 100 is sufficient.
3. Implement pagination at the base saved object loader level.

Option 1 will likely be sufficient to solve the problems. If we end up wanting to support >100 associations per vis, we can look into Options 2/3