kubevirt / hyperconverged-cluster-operator / 8553991252

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[operands]: Adding DaemonSet operand to deploy the swap agent (#2856)

* adding new operand called wasp-agent

wasp-agent is a DaemonSet that enables swap for
burstable QoS pods, including CNV workloads. The agent
mimics native swap implementation of k8s. This is a temporary
solution until swap will be GAed in kube.

wasp-agent will deployed directly by HCO operator, the deployment
is conditional: the enableHigherDensityWithSwap FG should be set.

HCO should have WASP_AGENT_IMAGE set for the wasp-agent container
image, otherwise the agent won't be deployed at all.

wasp-agent needs privileged access to the worker node, thus it
needs to operate with privileged SA and SCC. For simplicity matter
the SA of virt-handler will be re-used.

Signed-off-by: Igor Bezukh <ibezukh@redhat.com>

* wasp-agent: add relevant cluster roles

since the virt-handler SA doesn't have permissions
to do so, the relevant cluster role and its binding
objs were added as part of HCO deployment

In addition, wasp is going to re-use kubevirt-handler
service account, but the account is missing a cluster
role list pods, hence added custom cluster role for
both upstream vanilla deployment and via CSV in OLM.

Signed-off-by: Igor Bezukh <ibezukh@redhat.com>

* wasp-agent: adding the container image to CSV

container version bump would be done manually using hack/config
WASP_VERSION variable.

Signed-off-by: Igor Bezukh <ibezukh@redhat.com>

* wasp-agent: added e2e tests

Signed-off-by: Igor Bezukh <ibezukh@redhat.com>

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Signed-off-by: Igor Bezukh <ibezukh@redhat.com>

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