LOG-4095: fix loki labelKeys that contain slash

[jcantrill]

Description

This PR:

• fixes CLF loki label keys to replace slash with underscore

Links

https://issues.redhat.com/browse/LOG-4095
forward port of #2023

[openshift-ci-robot]

@jcantrill: This pull request references LOG-4095 which is a valid jira issue.

In response to this:

Description

This PR:

• fixes CLF loki label keys to replace slash with underscore

Links

https://issues.redhat.com/browse/LOG-4095
forward port of #2023

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jcantrill

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[vparfonov]

/lgtm

[openshift-ci]

@jcantrill: all tests passed!

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