fix: the project document timed out while opening (backport #45767)

[mergify]

Project performance issue causes

• Update the cost of the project while opening the record
• Project field was not indexed in multiple documents

  ---

  This is an automatic backport of pull request fix: the project document timed out while opening #45767 done by Mergify.

[mergify]

Cherry-pick of 33d03b1 has failed:

On branch mergify/bp/version-15-hotfix/pr-45767
Your branch is up to date with 'origin/version-15-hotfix'.

You are currently cherry-picking commit 33d03b1542.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   erpnext/accounts/doctype/sales_invoice/sales_invoice.json
	modified:   erpnext/projects/doctype/project/project.py

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   erpnext/selling/doctype/sales_order/sales_order.json

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally