UML-3510 Set System Message in Admin

[Lbagg1]

Purpose

current behaviour:

Clearing system message and selecting set system message in admin portal is not removing system message from service and seeing error “error updating system message”
Expected behaviour:

Given there is no text in both the English and Welsh message box for Use message
And there is no text in either the English or Welsh message box for View message
And I select set system message
And i will see a flash message “system message has been removed”
Then no message will be in data store

Fixes UML-3510

Checklist

• I have performed a self-review of my own code
• I have added tests to prove my work
• The product team have tested these changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.13%. Comparing base (ee45e51) to head (d563d59).
Report is 21 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2724      +/-   ##
============================================
- Coverage     91.14%   91.13%   -0.01%     
  Complexity     1497     1497              
============================================
  Files           306      307       +1     
  Lines          6312     6308       -4     
============================================
- Hits           5753     5749       -4     
  Misses          542      542              
  Partials         17       17              

Flag	Coverage Δ
use-an-lpa-admin	79.26% <100.00%> (-0.19%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...rvice-admin/internal/server/data/ssm_connection.go	50.00% <ø> (ø)
...rvice-admin/internal/server/data/system_message.go	100.00% <100.00%> (ø)
...ce-admin/internal/server/handlers/systemmessage.go	100.00% <100.00%> (ø)

[cooperaj]

This all looks great!

Get UAT signoff and it's good to go.