Update snowflake-connector-python to 3.0.0

[alopezz]

What does this PR do?

Updates snowflake-connector-python dependency to 3.0.0.

Motivation

It's needed to make dependency constraints for a cryptography update work: #13913

Additional Notes

Should be merged at the same time as the matching update on omnibus: DataDog/datadog-agent#15535

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• PR title must be written as a CHANGELOG entry (see why)
• Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• PR must have changelog/ and integration/ labels attached
• If the PR doesn't need to be tested during QA, please add a qa/skip-qa label.

[codecov]

Codecov Report

Merging #13926 (3be9253) into master (d07e515) will not change coverage.
The diff coverage is n/a.

Flag	Coverage Δ
snowflake	96.47% <ø> (ø)

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