[backend] clean caldera settings if executor is not enable

[MarineLeM]

Related issues

• Closes Error message of Caldera executor not responding when there is no Caldera config  #1550

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 32.77%. Comparing base (79deada) to head (883fdc1).
Report is 8 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #1559   +/-   ##
=========================================
  Coverage     32.76%   32.77%           
  Complexity     1502     1502           
=========================================
  Files           539      539           
  Lines         13883    13884    +1     
  Branches        824      824           
=========================================
+ Hits           4549     4550    +1     
+ Misses         9124     9123    -1     
- Partials        210      211    +1     

Flag	Coverage Δ
	32.77% <100.00%> (+<0.01%)	⬆️

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