fix: error 400 editing comment

[DmytroAlipov]

Description

When trying to edit a comment, an error 400 occurred. Provided that the user is a course instructor or staff, and simultaneously the author of the comment.

The issue is the presence of the editReasonCode parameter in the request.

This parameter is expected only if the editor is not the author of the post/comment, and is a staff or instructor.

After the fixes, everything works correctly.

NOTE: Similar changes were made to fix the post editing error.

Post-merge Checklist

• [ ] Deploy the changes to prod after verifying on stage or ask @openedx/edx-infinity to do it.
• [ ] 🎉 🙌 Celebrate! Thanks for your contribution.

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[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (a02771f) 91.86% compared to head (b4d236a) 91.86%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #533 +/- ## ======================================= Coverage 91.86% 91.86% ======================================= Files 170 170 Lines 3468 3468 Branches 904 904 ======================================= Hits 3186 3186 Misses 263 263 Partials 19 19 ``` | [Impacted Files](https://app.codecov.io/gh/openedx/frontend-app-discussions/pull/533?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx) | Coverage Δ | | |---|---|---| | [...s/post-comments/comments/comment/CommentEditor.jsx](https://app.codecov.io/gh/openedx/frontend-app-discussions/pull/533?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx#diff-c3JjL2Rpc2N1c3Npb25zL3Bvc3QtY29tbWVudHMvY29tbWVudHMvY29tbWVudC9Db21tZW50RWRpdG9yLmpzeA==) | `90.69% <100.00%> (ø)` | |

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[mphilbrick211]

Hi @asadazam93! Would you mind reviewing and merging if all looks good? Thanks!

[awais-ansari]

@DmytroAlipov Thanks for your contribution. The Team will review your PR very soon and let you know about it.

[awais-ansari]

@DmytroAlipov Please rebase this PR.

[DmytroAlipov]

@awais-ansari done

[openedx-webhooks]

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