STOR-209 Add pgbench app

[stgleb]

No description provided.

[Rohit-PX]

Let's add parameterized IOs later. Looks good to me now.

[codecov]

Codecov Report

Merging #644 into master will increase coverage by 3.68%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #644      +/-   ##
==========================================
+ Coverage   72.74%   76.42%   +3.68%     
==========================================
  Files          35       33       -2     
  Lines        3948     3708     -240     
==========================================
- Hits         2872     2834      -38     
+ Misses        826      642     -184     
+ Partials      250      232      -18     

Impacted Files	Coverage Δ
pkg/storkctl/factory.go	62.29% <0.00%> (-1.77%)	⬇️
pkg/storkctl/get.go	73.84% <0.00%> (-0.40%)	⬇️
pkg/storkctl/applicationregistration.go
pkg/storkctl/watch.go
pkg/monitor/monitor.go	66.06% <0.00%> (+0.97%)	⬆️
pkg/storkctl/snapshot.go	72.72% <0.00%> (+1.47%)	⬆️
pkg/storkctl/migrationschedule.go	85.18% <0.00%> (+1.71%)	⬆️
pkg/storkctl/applicationbackupschedule.go	84.68% <0.00%> (+1.76%)	⬆️
pkg/storkctl/applicationbackup.go	78.69% <0.00%> (+2.26%)	⬆️
pkg/storkctl/applicationclone.go	83.53% <0.00%> (+2.47%)	⬆️
... and 4 more

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[cnbu-jenkins]

Can one of the admins verify this patch?