RLVR Recipe in added post-training section

[mvinci12]

Issue #, if available:

Description of changes:

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[KeitaW]

Nice work! but let's not add submodule.

[KeitaW]

The directory structure under test case is formatted as framework/library/testcase (ex: https://github.com/aws-samples/awsome-distributed-training/tree/main/3.test_cases/pytorch/trl/grpo, https://github.com/aws-samples/awsome-distributed-training/tree/main/3.test_cases/pytorch/picotron/SmolLM-1.7B. Let's employ the same structure ( pytorch/verl/rlvr ?).

[mvinci12]

lmk - thanks keita!

[KeitaW]

• I take a look at https://github.com/aws-samples/awsome-distributed-training/pull/891/files and realized that commit post-trainng/rlvr and pytorch/verl/rlvr. Could you please remove post-trainng/rlvr ?
• Do we want to maintain grafana dashboards? (ex: 3.test_cases/post-training/rlvr/observability/dashboards/data_grafana_dashboard.json). Could we instead refer dashboards maintained by Anyscale (https://docs.anyscale.com/monitoring/grafana-dashboards)?

[KeitaW]

Left some additional minor comments.

[KeitaW]

I've stopped blocking this PR from merging, but please consider addressing the remaining comments before merging.

[KeitaW]

Thanks again for the contribution!

[nghtm]

Nice!