Huijie fix add lost hours editing deleting

[metaphor987]

Description

Related PRS (if any):

This backend PR is related to the frontend PR 2710.

Main changes explained:

The error when adding, editing, or deleting lost hours is caused by a Mongoose validation error for users with an empty jobTitle field. Setting the validateModifiedOnly option to true when saving updates to the user profile can ensure that only modified fields are validated.

How to test:

1. check into current branch
2. do npm install, run run build and npm start to run this PR locally
3. Clear site data/cache
4. log as admin or owner user (admin user do not have permission for adding lost hours)
5. go to Reports -> Reports -> Add Lost Time, or Show Person Lost Time, verify that the following errors do not occur:
6. owners do not get a 500 error when adding a person's lost time:
   error image before the PR
   
7. Do not get an error when updating a person's lost time
   error image before the PR
   
8. Do not get an error when deleting a person's lost time
   error image before the PR:
   
9. owners do not get an error when adding a lost time for team or project:
   error image before the PR:
   
   Thank you!

[Ankuriboh]

Easy fix that only validates modified fields. Can confirm that new data is stored in database.

[javid679]

Logged in as DevAdmin, can confirm data is stored in the database, below is the video for reference:

PR1115_.screenshot.mp4

[sheetalmangate]

As per user story code changes look good but I could not able to test this PR locally

[hqzhu0913]

Both people and team edit time work as expected. But there is no adding function as explained.