remove last updated backported to 2.0

[kohinoor98]

Description

Removed "last updated by" sections from the UI as the SearchMonitor API is no longer intended to return that info. See the issue below for more details.

I have backported for 2.0

Issues Resolved

#763

Check List

• [x] Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license. For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[AWSHurneyt]

Manual backport of PR https://github.com/opensearch-project/alerting-dashboards-plugin/pull/767

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (72be8ab) 52.74% compared to head (c4c3323) 52.75%.

Additional details and impacted files

@@            Coverage Diff             @@
##              2.0     #804      +/-   ##
==========================================
+ Coverage   52.74%   52.75%   +0.01%     
==========================================
  Files         209      209              
  Lines        5451     5448       -3     
  Branches      763      761       -2     
==========================================
- Hits         2875     2874       -1     
+ Misses       2574     2572       -2     
  Partials        2        2              

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