Improved handling of GitHub rate limit errors.

[LRWeber]

Adds specific handling for more rate limit related error statuses, particularly for secondary rate limits.

Related GitHub documentation:

• https://docs.github.com/en/rest/overview/rate-limits-for-the-rest-api?apiVersion=2022-11-28#exceeding-the-rate-limit
• https://docs.github.com/en/graphql/overview/rate-limits-and-node-limits-for-the-graphql-api#exceeding-the-rate-limit

[IanLee1521]

@LRWeber - I cut a new 0.14.0 release with this MR in it: https://pypi.org/project/llnl-scraper/0.14.0/