WebIDE changes file permission of files when renaming or moving to different directory
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### Summary
When editing an executable file using GitLab's [WebIDE](https://docs.gitlab.com/user/project/web_ide/), the `executable` bit is removed if the file is moved to a different directory or renamed.
### Steps to reproduce
Steps to Reproduce
1. On local, create a file called `test.sh`, and grant it executable permissions.
```
chmod +x test.sh
```
3. Commit and push to `main` on GitLab.
4. Open the project in Web IDE.
5. Move the `test.sh` file to a folder called `xyz`.
6. Commit and push from WebIDE on a different branch - `feature/moved-to-directory-via-webide`.
7. Raise an MR from `feature/moved-to-directory-via-webide` to main, you can then see in the diff that the permissions has changed from `100755` to `100644`.
8. Open another session for the project in the Web ID.
9. Rename the `test.sh` file to `new.sh`.
10. Commit and push from WebIDE on a different branch - `feature/renamed-via-webide`.
11. Raise an MR from `feature/renamed-via-webide` to main, you can then see in the diff that the permissions has changed from `100755` to `100644`.
### Example Project
<!-- If possible, please create an example project here on GitLab.com that exhibits the problematic
behavior, and link to it here in the bug report. If you are using an older version of GitLab, this
will also determine whether the bug is fixed in a more recent version. -->
- https://gitlab.com/kballon-bug-report/zd646337_webide_changes_permission/-/merge_requests/1
- https://gitlab.com/kballon-bug-report/zd646337_webide_changes_permission/-/merge_requests/2
### What is the current *bug* behavior?
The permissions are not properly retained after renaming or moving the files.
### What is the expected *correct* behavior?
The permissions should be retained after renaming or moving the files.
### Relevant logs and/or screenshots
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as it's tough to read otherwise. -->
### Output of checks
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This bug happens on GitLab.com
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<!-- or follow up with an issue comment of `@gitlab-bot label ~"reproduced on GitLab.com"` if you do not -->
#### Results of GitLab environment info
<!-- Input any relevant GitLab environment information if needed. -->
<details>
<summary>Expand for output related to GitLab environment info</summary>
<pre>
(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:env:info`)
(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production`)
</pre>
</details>
#### Results of GitLab application Check
<!-- Input any relevant GitLab application check information if needed. -->
<details>
<summary>Expand for output related to the GitLab application check</summary>
<pre>
(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:check SANITIZE=true`)
(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true`)
(we will only investigate if the tests are passing)
</pre>
</details>
### Possible fixes
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### Patch release information for backports
If the bug fix needs to be backported in a [patch release](https://handbook.gitlab.com/handbook/engineering/releases/patch-releases) to a version
under [the maintenance policy](https://docs.gitlab.com/policy/maintenance/), please follow the steps on the
[patch release runbook for GitLab engineers](https://gitlab.com/gitlab-org/release/docs/-/blob/master/general/patch/engineers.md).
Refer to the [internal "Release Information" dashboard](https://dashboards.gitlab.net/d/delivery-release_info/delivery3a-release-information?orgId=1)
for information about the next patch release, including the targeted versions, expected release date, and current status.
#### High-severity bug remediation
To remediate high-severity issues requiring an [internal release](https://handbook.gitlab.com/handbook/engineering/releases/internal-releases/) for single-tenant SaaS instances,
refer to the [internal release process for engineers](https://gitlab.com/gitlab-org/release/docs/-/blob/master/general/internal-releases/engineers.md?ref_type=heads).
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