feat(sdk): Initial support for migrating W&B runs and reports between instances

[andrewtruong]

Fixes

• Part 6 of a series of PRs for landing W&B -> W&B Import API (please review 1-5 first, otherwise this PR will look massive)

1. https://github.com/wandb/wandb/pull/5780
2. https://github.com/wandb/wandb/pull/5781
3. https://github.com/wandb/wandb/pull/5782
4. https://github.com/wandb/wandb/pull/5783
5. https://github.com/wandb/wandb/pull/5785
6. https://github.com/wandb/wandb/pull/5777

Description

What does the PR do?

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This pull request adds a new feature for importing runs and artifacts from other tools like MLFlow and wandb using different methods and formats. It also updates the tests, the CLI, and the reports API to support the new feature, and fixes some minor issues with the code style and indentation. The main files affected are .circleci/config.yml, wandb/apis/importers/*, wandb/cli/cli.py, wandb/apis/reports/*, and tests/pytest_tests/system_tests/*.

Testing

How was this PR tested?

Checklist

• [ ] Include reference to internal ticket "Fixes WB-NNNNN" and/or GitHub issue "Fixes #NNNN" (if applicable)
• [ ] Ensure PR title compliance with the conventional commits standards

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Importers feature wandb and mlflow sync Autumn data harvest