NETOBSERV-2221 follow-up: make default metrics, show % ipsec traffic

[jotak]

Description

Follow-up on #1543
Adding:

• the added metric is enabled by default (when feature enabled)
• show the % of encrypted traffic
  • for this, another metric is included, that measures traffic between nodes (excluding inner traffic)

Dependencies

n/a

[OlivierCazade]

LGTM

[openshift-ci]

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[openshift-ci]

@jotak: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-operator	efc4de6	link	false	/test e2e-operator

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[memodi]

/label qe-approved