fix: Return 200 in VCT health check if disabled or not yet configured

[bstasyszyn]

If VCT is disabled or if the log endpoint has not yet been configured then the VCT health check does not cause the health check to fail, it simply returns the status of VCT.

closes #1360

Signed-off-by: Bob Stasyszyn Bob.Stasyszyn@securekey.com

[codecov]

Codecov Report

Merging #1384 (5e0ef43) into main (41ab9a7) will increase coverage by 0.01%.
The diff coverage is 89.13%.

@@            Coverage Diff             @@
##             main    #1384      +/-   ##
==========================================
+ Coverage   87.94%   87.96%   +0.01%     
==========================================
  Files         205      205              
  Lines       19029    19047      +18     
==========================================
+ Hits        16735    16754      +19     
- Misses       1471     1472       +1     
+ Partials      823      821       -2     

Impacted Files	Coverage Δ
pkg/config/client/client.go	89.18% <33.33%> (-6.27%)	⬇️
cmd/orb-server/startcmd/start.go	67.31% <50.00%> (-0.59%)	⬇️
pkg/discovery/endpoint/restapi/operations.go	88.21% <83.33%> (-0.31%)	⬇️
pkg/httpserver/server.go	87.30% <100.00%> (+10.10%)	⬆️
pkg/vct/vct.go	86.46% <100.00%> (+1.22%)	⬆️

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