Add ability to upload Ludwig models to Predibase.

[martindavis]

Adds the ability for Ludwig users to upload their models to Predibase.

ludwig upload predibase -r "test_repo_ludwig_cli_2" -m /path/to/results/experiment_run_0/ -df /path/to/dataset.csv
Connected to Predibase as User(id=123, username=martin)
Dataset name was not explicitly provided. Defaulting to: reuters
Uploading dataset...
Dataset uploaded.
Created model repository: <test_repo_ludwig_cli_2>
presigned_url {'url': 'https://s3.us-west-2.amazonaws.com/some-bucket-name/presigned-url', 'headers': None}
Model uploaded to Predibase with repository name `test_repo_ludwig_cli`

• @arnavgarg1 to test HF upload process

[github-actions]

Unit Test Results

  6 files  ±  0    6 suites  ±0   20m 58s ⏱️ - 19m 19s
12 tests  - 19    9 ✔️  - 17    3 💤  - 2  0 ❌ ±0 
60 runs   - 22  42 ✔️  - 24  18 💤 +2  0 ❌ ±0 

Results for commit 72935aa. ± Comparison against base commit e46a989.

This pull request removes 19 tests.

tests.integration_tests.test_cli ‑ test_reproducible_cli_runs[horovod-experiment-1919-0]
tests.integration_tests.test_cli ‑ test_reproducible_cli_runs[horovod-experiment-1919-1]
tests.integration_tests.test_cli ‑ test_reproducible_cli_runs[horovod-experiment-31-0]
tests.integration_tests.test_cli ‑ test_reproducible_cli_runs[horovod-experiment-31-1]
tests.integration_tests.test_cli ‑ test_reproducible_cli_runs[horovod-train-1919-0]
tests.integration_tests.test_cli ‑ test_reproducible_cli_runs[horovod-train-1919-1]
tests.integration_tests.test_cli ‑ test_reproducible_cli_runs[horovod-train-31-0]
tests.integration_tests.test_cli ‑ test_reproducible_cli_runs[horovod-train-31-1]
tests.integration_tests.test_cli ‑ test_train_cli_horovod
tests.integration_tests.test_horovod ‑ test_horovod_gpu_memory_limit
…

♻️ This comment has been updated with latest results.

[justinxzhao]

Is there a reasonable test that we can write for this?

[martindavis]

Is there a reasonable test that we can write for this?

Great question @justinxzhao ! @arnavgarg1 and I talked about adding an integration test in the CI to make sure that this works for both HF and Predibase. Our plan is to tackle that late next week!