Hotfix: Added option to disable the checksum verification

[cwognum]

Changelogs

• Added the verify_checksum parameter to load_dataset and load_benchmark.

---

Checklist:

• Was this PR discussed in an issue? It is recommended to first discuss a new feature into a GitHub issue before opening a PR.
• Add tests to cover the fixed bug(s) or the newly introduced feature(s) (if appropriate).
• Update the API documentation if a new function is added, or an existing one is deleted.
• Write concise and explanatory changelogs above.
• If possible, assign one of the following labels to the PR: feature, fix or test (or ask a maintainer to do it for you).

---

#77 changed how the checksum is computed, which created errors when loading a dataset or benchmark from the hub. More generally, I think the checksum can be a little brittle so having a way to disable it seems good.