[Model] Update MPT model with GLU and rope and add low precision layer norm

[kazuki]

This PR does the following like #4116

• Update the MPT model to match the latest in https://github.com/mosaicml/llm-foundry/tree/main/llmfoundry/models/mpt
• Add low precision layer norm
• Allow MPT model to select layer norm algorithms

differents from #4116 is

• Uses MergedColumnParallelLinear instead of two separated ColumnParallelLinear
• Uses torch.get_autocast_dtype instead of old APIs (get_autocast_gpu_dtype / get_autocast_cpu_dtype)
• Reduces redundants code.

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[kazuki]

I rebased it because it was conflicting with the current main branch.

[mergify[bot]]

This pull request has merge conflicts that must be resolved before it can be merged. Please rebase the PR, @kazuki.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

[kazuki]

I rebased. Some tests have failed, but this PR is not the cause.

[kazuki]

rebased

[github-actions[bot]]

This pull request has been automatically marked as stale because it has not had any activity within 90 days. It will be automatically closed if no further activity occurs within 30 days. Leave a comment if you feel this pull request should remain open. Thank you!

[mergify[bot]]

This pull request has merge conflicts that must be resolved before it can be merged. Please rebase the PR, @kazuki.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

[mergify[bot]]

This pull request has merge conflicts that must be resolved before it can be merged. Please rebase the PR, @kazuki.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

[github-actions[bot]]

This pull request has been automatically marked as stale because it has not had any activity within 90 days. It will be automatically closed if no further activity occurs within 30 days. Leave a comment if you feel this pull request should remain open. Thank you!

[github-actions[bot]]

This pull request has been automatically closed due to inactivity. Please feel free to reopen if you intend to continue working on it. Thank you!