[Snyk] Security upgrade centos from 7 to 8

[snyk-bot]

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Changes included in this PR

• KubeArmor/build/Dockerfile.kubearmor.selinux

We recommend upgrading to centos:8, as this image has only 230 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Some of the most important vulnerabilities in your base image include:

Severity	Priority Score / 1000	Issue	Exploit Maturity
	614	Incorrect Conversion between Numeric Types SNYK-CENTOS7-GLIB2-2182590	No Known Exploit
	786	Buffer Overflow SNYK-CENTOS7-NSS-2308137	No Known Exploit
	786	Buffer Overflow SNYK-CENTOS7-NSSSYSINIT-2308141	No Known Exploit
	786	Buffer Overflow SNYK-CENTOS7-NSSTOOLS-2308139	No Known Exploit
	614	NULL Pointer Dereference SNYK-CENTOS7-OPENSSLLIBS-2178963	No Known Exploit

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[codecov-commenter]

Codecov Report

Merging #542 (76639f1) into main (e96f434) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #542      +/-   ##
==========================================
- Coverage   37.97%   37.95%   -0.02%     
==========================================
  Files          23       23              
  Lines        9165     9165              
==========================================
- Hits         3480     3479       -1     
  Misses       5295     5295              
- Partials      390      391       +1     

Impacted Files	Coverage Δ
KubeArmor/monitor/syscallParser.go	79.97% <0.00%> (-0.33%)	⬇️
KubeArmor/monitor/systemMonitor.go	32.27% <0.00%> (+0.37%)	⬆️

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