Lambda: event invoke config

[rafcio19]

Resolves #6931

GetFunctionEventInvokeConfig ✅
ListFunctionEventInvokeConfigs ✅
PutFunctionEventInvokeConfig ✅
UpdateFunctionEventInvokeConfig ✅
DeleteFunctionEventInvokeConfig ✅

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4e1ea0b) 95.85% compared to head (7b306cd) 95.88%.
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7078      +/-   ##
==========================================
+ Coverage   95.85%   95.88%   +0.02%     
==========================================
  Files         834      834              
  Lines       81760    82100     +340     
==========================================
+ Hits        78375    78719     +344     
+ Misses       3385     3381       -4     

Flag	Coverage Δ
servertests	35.81% <15.85%> (+0.17%)	⬆️
unittests	95.82% <100.00%> (+0.02%)	⬆️

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[bblommers]

LGTM - thank you for adding this feature @rafcio19!