Description of problem: 

Logging 6.4 – Loki default alert rules are not created on the OpenShift 4.18 cluster

Version-Release number of selected component (if applicable):

Openshift Logging 6.4 

Loki operator 6.4 

Openshift - 4.18

Steps to Reproduce:

1.  Create cluster for 4.18
2. Install the logging operator and Loki operator with version 6.4 
3. Configure Lokistack CR And CLF. 
4. Check the Alert rule tab and search Loki. No alert rule found 

Actual results:

No alert rule found for Loki. 

Expected results:

It should list Alert rules like below: 

1. LokiStackWriteRequestErrors
2. LokiRequestErrors
3. LokiIngesterFlushFailureRateCritical
4. LokistackComponentsNotReadyWarning

Additional info:

I configured LokiStack multiple times on OpenShift versions 4.18.1 and 4.18.26 and encountered the same issue. However, the issue does not occur on OpenShift 4.19 or 4.20 clusters.

Providing screenshots for reference:

• The first screenshot is from the OpenShift 4.18 cluster, where no AlertRules for Loki are visible. 

• The second screenshot is from the OpenShift 4.20 cluster, where the Loki AlertRules are present as expected.