[Workspace] update workspace not found message to generic message

[Hailong-am]

Description

Update workspace not found message to generic message which not include workspace information

Issues Resolved

Screenshot

Testing the changes

curl --request GET \
  --url http://localhost:5601/api/workspaces/you%20system%20id%20down \
  --header 'Content-Type: application/json' \
  --header 'osd-xsrf: 1'

# response 
{
 "success": false,
 "error": "workspace not found"
}

Changelog

• fix: Update workspace not found message to generic message

Check List

• All tests pass
  • yarn test:jest
  • yarn test:jest_integration
• New functionality includes testing.
• New functionality has been documented.
• Update CHANGELOG.md
• Commits are signed per the DCO using --signoff

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 61.01%. Comparing base (53fe4c1) to head (e76439c).

Files with missing lines	Patch %	Lines
src/plugins/workspace/server/workspace_client.ts	33.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9189      +/-   ##
==========================================
- Coverage   61.01%   61.01%   -0.01%     
==========================================
  Files        3813     3813              
  Lines       91401    91404       +3     
  Branches    14443    14444       +1     
==========================================
+ Hits        55772    55773       +1     
- Misses      32067    32068       +1     
- Partials     3562     3563       +1     

Flag	Coverage Δ
Linux_1	29.08% <33.33%> (+<0.01%)	⬆️
Linux_2	56.45% <ø> (ø)
Linux_3	38.03% <ø> (ø)
Linux_4	29.03% <ø> (ø)
Windows_1	29.09% <33.33%> (+<0.01%)	⬆️
Windows_2	56.40% <ø> (ø)
Windows_3	38.03% <ø> (ø)
Windows_4	29.03% <ø> (ø)

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