Add SecCompProfileName for system-probe

[clamoriniere]

What does this PR do?

Add secCompProfileName parameter in system-probe spec.

Motivation

In order to ease the debuging of system-probe container, add the possibility to provides another seccomp profile.

Additional Notes

Anything else we should know when reviewing?

[codecov-io]

Codecov Report

Merging #60 into master will decrease coverage by 0.00%.
The diff coverage is 60.00%.

@@            Coverage Diff             @@
##           master      #60      +/-   ##
==========================================
- Coverage   56.96%   56.95%   -0.01%     
==========================================
  Files          31       31              
  Lines        4108     4112       +4     
==========================================
+ Hits         2340     2342       +2     
- Misses       1584     1585       +1     
- Partials      184      185       +1     

Flag	Coverage Δ
#unittests	56.95% <60.00%> (-0.01%)	⬇️

Impacted Files	Coverage Δ
pkg/controller/datadogagent/utils.go	82.11% <60.00%> (-0.15%)	⬇️

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[ahmed-mez]

LGTM, but it would be nice to add a test cases for system-probe seccomp and apparmor profiles config in datadogagent_controller_test.go