[NovaX] Remove CircleCI

[osalpekar]

This PR removes most of the CircleCI directory. Primarily, this removes the CircleCI config files. These were the remaining jobs in the CCI configs:

• Lint Jobs - these were migrated to Nova and removed from CCI by [NovaX] Lint Job on GHA #2151
• Smoke Test docker build - AFAICT, this docker build is not used by anybody apart from a smoke test. We already have smoke tests running in the CircleCI jobs, release workflows, and the pytorch-wide validation workflows, so unlikely that these add any extra useful validation
• StyleCheck Job - Defined but never called anywhere. For this reason, we did not migrate this to Nova.
• CircleCI Consistency - Not Needed if there is no CCI config anymore.

We also removed the following:

• Scripts used to commit the docs after the build_docs job - these are done in-line here: https://github.com/pytorch/text/blob/main/.github/workflows/build-docs.yml.
• Scripts for sorting CCI test output.
• Scripts to build the smoke test docker container above.

In a follow-up, we can move the unittest scripts to the .github (or other) directory and remove the .circleci/ directory entirely.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/text/2173

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❌ 2 New Failures

As of commit fb89a4e:

NEW FAILURES - The following jobs have failed:

• build (gh)
• Build M1 Conda (gh)

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