Merge pull request #1367 from elezar/remove-centos8-ppc64le-sign #1203

Job	Run time
variables	3s
code-scanning / Analyze Go code with CodeQL	1m 45s
golang / check	31s
golang / Unit test	56s
golang / Build	22s
image / packages (ubuntu18.04-amd64, false)	3m 18s
image / packages (ubuntu18.04-arm64, false)	19m 36s
image / packages (centos7-aarch64, false)	19m 29s
image / packages (centos7-x86_64, false)	3m 24s
image / image (packaging)	40s
image / image (application)	5m 49s
e2e-test / e2e-tests (false, 550)	15m 43s
e2e-test / e2e-tests (false, 575)	19m 35s
	1h 31m 11s

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