Better customization of DefaultBatchLoadRetryStrategy

[ZeldaZach]

Issue #, if available: N/A

Description of changes: The DefaultBatchLoadRetryStrategy did not support customization for the number of retries to attempt. I found this odd as the DefaultBatchWriteRetryStrategy did allow this feature, so I ported a fix over. While a small change, I find this to be a net positive as these operations are very similar and having different ctor args felt off to me.

I'm a SDE within Prime Video and this use case came up for us when we wanted to specify our own Builder config. I find it interesting how we're the first group to want a change to the default max retry count.

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