Added Gloo as a backend option

[sayantan1410]

Fix #201

What is the purpose of this pull request?

• New feature

Let me know if I something needs to be changed.

[netlify]

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[sayantan1410]

@vfdev-5 I ran this bash scripts/run_code_style.sh lint but it did not make any changes, while the ci/lint test is failing, can you tell me why ?

[vfdev-5]

@sayantan1410 thanks for the PR, almost good. Two things to fix:

• run prettier to fix ci/lint (https://github.com/pytorch-ignite/code-generator/runs/4934201901?check_suite_focus=true#step:9:9)
  • I think our contributing guide lacks this info, cc @ydcjeff
• replace all occurencies of nccl by tags+backend in all readmes
  • for example, https://github.com/pytorch-ignite/code-generator/pull/203/files#diff-ae96dfae20580bd8b1957960a4b26c1eced4361fd511af8a0730cd3ce3fc92f2L47

Here is current PR preview: https://deploy-preview-203--code-generator.netlify.app/create
where you can see that even while choosing backend as gloo, the command still contains nccl:

[jeffydc]

@sayantan1410 if you have installed npm packages, you can run pnpm run fmt to auto format.

[vfdev-5]

Thanks a lot for the PR @sayantan1410 !
LGTM

[sayantan1410]

@ydcjeff thanks that worked !!
@vfdev-5 thanks for merging !!