React/Jest tests for MemoryTable.js

[shivaahir158]

Motivate of the pull request

• To address an existing issue. If so, please provide a link to the issue:
• Breaking new feature. If so, please describe details in the description part.

Describe the technical details -

1. Added tests to verify that the MemoryTable header is rendered correctly.
2. Added tests to validate that the memory power total is displayed accurately.

Which part of the code base require a change

• Frontend: MemoryTable.test.js
• Backend:
• Library: <Specify the library name, e.g. npm packages>
• Plug-in: <Specify the plugin name, e.g. Webpack, jtest>
• Documentation
• Regression tests
• Continuous Integration (CI) scripts

Impact of the pull request

• Require a change on Quality of Results (QoR)
• Break backward-compatibility. If so, please list who may be influenced.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.18%. Comparing base (2c65e55) to head (69953e6).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #243      +/-   ##
==========================================
+ Coverage   69.86%   70.18%   +0.32%     
==========================================
  Files         110      110              
  Lines        8607     8607              
==========================================
+ Hits         6013     6041      +28     
+ Misses       2594     2566      -28     

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