Allow tornado 6.2

[ptrba]

Trying to upgrade to tornado 6.2. Latest tornado upgrade dates back to 2019: #2547.

[GPUtester]

Can one of the admins verify this patch?

Admins can comment ok to test to allow this one PR to run or add to allowlist to allow all future PRs from the same author to run.

[github-actions]

Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

       15 files  ±0         15 suites  ±0   6h 14m 15s ⏱️ + 17m 46s
  3 108 tests ±0    3 023 ✔️ +1    85 💤 ±0  0 ❌  - 1 
23 005 runs  ±0  22 098 ✔️ +1  907 💤 +1  0 ❌  - 2 

Results for commit 15e7145. ± Comparison against base commit 34042be.

[jrbourbeau]

Thanks for the PR @barmettl. You might be interested in taking a look at #6991 which adds Tornado 6.2 support. There are currently some deprecation warning that need to be resolves -- possibly changes in behavior too

[ptrba]

Thanks @jrbourbeau, overlooked #6991. Closing this. Looks like the test report for this upgrade is now positive, so #6991 might be ready for merge by now.