[Index Management] Missing values in index details flyout

[yuliacech]

Kibana version:
main branch at e76cedb

Elasticsearch version:
ES snapshot 2022-01-09

Server OS version:
macOS BigSur

Browser version:
Google Chrome Version 97.0.4692.71 (Official Build) (x86_64)

Browser OS version:
macOS BigSur

Original install method (e.g. download page, yum, from source, etc.):
source code

Describe the bug:
"Docs Deleted" and "Primary Storage Size" values are missing in the index details flyout.

Steps to reproduce:

1. Navigate to "Index Management"
2. Click on an index name in the table to open the details flyout
3. Check the values in the "Summary" tab

Expected behavior:
"Docs Deleted" and "Primary Storage Size" values should be correctly displayed.

Screenshots (if relevant):

Errors in browser console (if relevant):

Provide logs and/or server output (if relevant):

Any additional context:

[elasticmachine]

Pinging @elastic/platform-deployment-management (Team:Deployment Management)