[8.16] [ML] Trained Models: fix NaN in a progress bar during the download task initialization (#201221) (#201341)

# Backport

This will backport the following commits from `main` to `8.16`:
- [[ML] Trained Models: fix `NaN` in a progress bar during the
download task initialization
(#201221)](https://github.com/elastic/kibana/pull/201221)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Dima
Arnautov","email":"dmitrii.arnautov@elastic.co"},"sourceCommit":{"committedDate":"2024-11-22T10:26:56Z","message":"[ML]
Trained Models: fix `NaN` in a progress bar during the download task
initialization (#201221)\n\n## Summary\r\n\r\nWhen we request a status
of the download task right after initializing a\r\ndownload,
`total_parts` might be returned with a `0` value, hence\r\ndividing by 0
for the progress bar causing in `NaN%` value rendered.\r\nThis PR adds a
fallback to `-1` for that, to make sure we render 0%.\r\n\r\n###
Checklist\r\n\r\n- [ ] [Unit or
functional\r\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\r\nwere
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Trained Models: fix `NaN` in a progress bar during the download task
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","number":201221,"url":"https://github.com/elastic/kibana/pull/201221","mergeCommit":{"message":"[ML]
Trained Models: fix `NaN` in a progress bar during the download task
initialization (#201221)\n\n## Summary\r\n\r\nWhen we request a status
of the download task right after initializing a\r\ndownload,
`total_parts` might be returned with a `0` value, hence\r\ndividing by 0
for the progress bar causing in `NaN%` value rendered.\r\nThis PR adds a
fallback to `-1` for that, to make sure we render 0%.\r\n\r\n###
Checklist\r\n\r\n- [ ] [Unit or
functional\r\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\r\nwere
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Trained Models: fix `NaN` in a progress bar during the download task
initialization (#201221)\n\n## Summary\r\n\r\nWhen we request a status
of the download task right after initializing a\r\ndownload,
`total_parts` might be returned with a `0` value, hence\r\ndividing by 0
for the progress bar causing in `NaN%` value rendered.\r\nThis PR adds a
fallback to `-1` for that, to make sure we render 0%.\r\n\r\n###
Checklist\r\n\r\n- [ ] [Unit or
functional\r\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\r\nwere
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BACKPORT-->

Co-authored-by: Dima Arnautov <dmitrii.arnautov@elastic.co>

x-pack/plugins/ml/public/application/model_management/models_list.tsx

@@ -697,7 +697,7 @@ export const ModelsList: FC<Props> = ({
                     <>
                       {downloadState
                         ? (
-                            (downloadState.downloaded_parts / downloadState.total_parts) *
+                            (downloadState.downloaded_parts / (downloadState.total_parts || -1)) *
                             100
                           ).toFixed(0) + '%'
                         : '100%'}