[usage] Fix alerting rules

[easyCZ]

Description

Prometheus operator has been failing with this error:

range vector in call to function \"increase\", got instant vector"
level=info ts=2022-09-23T13:31:35.581579042Z caller=rules.go:340 component=prometheusoperator msg="Invalid rule" err="35:11: group \"usage\", rule 3, \"GitpodUsageBillingServiceFinalizeInvoiceFailures\": could not parse expression: 1:14: parse error: expected type range vector in call to function \"increase\", got instant vector"
level=info ts=2022-09-23T13:31:35.581586956Z caller=rules.go:340 component=prometheusoperator msg="Invalid rule" err="61:11: group \"usage\", rule 5, \"GitpodUsageStripeWebhookFailures\": could not parse expression: 1:14: parse error: expected type range vector in call to function \"increase\", got instant vector"
level=error ts=2022-09-23T13:31:35.600973771Z caller=klog.go:116 component=k8s_client_runtime func=ErrorDepth msg="sync \"monitoring-satellite/k8s\" failed: Invalid rule"
level=info ts=2022-09-23T13:31:35.601067883Z caller=operator.go:1559 component=prometheusoperator key=monitoring-satellite/k8s msg="update prometheus status"

This change should fix the issue.

Related Issue(s)

Fixes #

How to test

Release Notes

NONE

Documentation

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