LOG-3223: fix reconciliation of promethusrule to get before create

[jcantrill]

Description

This PR:

• fixes reconcilation of prometheusrule to get before create

Links

• https://issues.redhat.com/browse/LOG-3223

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jcantrill

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[syedriko]

/test e2e-ocp-next

[vimalk78]

/retest

[vimalk78]

/lgtm

[openshift-ci]

@jcantrill: 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/e2e-ocp-next	6a46db7	link	false	/test e2e-ocp-next

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