NETOBSERV-660: Create metric section

[OlivierCazade]

As an anticipation to more work regarding metrics in FLP and before going GA, create sub metric section in processor section.

[OlivierCazade]

/retest

[jotak]

/hold
let see with @memodi if we want it in 0.1.5

[memodi]

/hold let see with @memodi if we want it in 0.1.5

thanks @jotak, seems straightforward change, should be fine adding it in if its already reviewed and good to be approved.

[memodi]

/ok-to-test

[github-actions]

New image: ["quay.io/netobserv/network-observability-operator:fe7b7aa"]. It will expire after two weeks.

[jotak]

/unhold

[memodi]

/qe-approved
tested pre-merge.

[jotak]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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