OPCT-336: added github templates for issues and PR

[mtulio]

Completing the Community Standards: https://github.com/redhat-openshift-ecosystem/provider-certification-plugins/community

https://issues.redhat.com/browse/OPCT-336
https://issues.redhat.com/browse/OPCT-239

[openshift-ci]

@jcpowermac: changing LGTM is restricted to collaborators

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: jcpowermac
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[mtulio]

Merging manually after approval from the team.