NO-ISSUE: add MCE to OLM operators dev docs

[oourfali]

Updating the developer docs for the OLM operator plugin infrastructure to include MCE and the relevant repo link.

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gamli75, oourfali

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[gamli75]

/retitle NO-ISSUE: add MCE to OLM operators dev docs

[openshift-ci-robot]

@oourfali: This pull request explicitly references no jira issue.

In response to [this](https://github.com/openshift/assisted-service/pull/6689): >Updating the developer docs for the OLM operator plugin infrastructure to include MCE and the relevant repo link. Instructions for interacting with me using PR comments are available [here](https://prow.ci.openshift.org/command-help?repo=openshift%2Fassisted-service). If you have questions or suggestions related to my behavior, please file an issue against the [openshift-eng/jira-lifecycle-plugin](https://github.com/openshift-eng/jira-lifecycle-plugin/issues/new) repository.

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[ART PR BUILD NOTIFIER]

Distgit: ose-agent-installer-api-server This PR has been included in build ose-agent-installer-api-server-container-v4.18.0-202408201312.p0.ga3cf43b.assembly.stream.el9. All builds following this will include this PR.