Investigate why agent throws errors that it is not able to modify the inventory configmap
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## Description
The following discussion from !139209 should be addressed:
- [ ] @cwoolley-gitlab started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/139209#note_1706489871): (+1 comment)
> @vtak When testing this locally, I got the following error in the agent logs:
>
> ```
> {"level":"error","time":"2023-12-22T18:42:16.853-0700","msg":"Error when applying config","mod_name":"remote_development","error":"task failed (action: \"Inventory\", name: \"inventory-add-0\"): Operation cannot be fulfilled on configmaps \"workspace-4-1-vhwjm8-workspace-inventory\": the object has been modified; please apply your changes to the latest version and try again","inventory_name":"workspace-4-1-vhwjm8-workspace-inventory","inventory_namespace":"gl-rd-ns-4-1-vhwjm8","agent_id":4}
> ```
>
> I had two running workspaces at the time, and I was connected to one of them, but this error seemed to only happen for _ONE_ of the workspaces, and it was not the one that I was connected to.
>
> This happened twice, both times I updated the `default_resources_per_workspace_container.requests`.
>
> However, it still seemed to get the changes applied to both containers in each workspace pod.
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