[konflux] set build retires to 3

[ashwindasr]

Now that we have our own cluster, we can reduce the number of retires to 3, as it was originally set. If builds fail here, its most likely a legit issue which warrants further investigation and not a flake, so no need for additional retires

[openshift-ci]

@ashwindasr: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/security	360a8ef	link	false	/test security

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[locriandev]

/lgtm

[openshift-ci]

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