This fetches the Cilium pod information right after we initialized the
client. This change should not have any functional changes, but allows
future commits to access those Cilium pods early.

Signed-off-by: Sebastian Wicki <sebastian@isovalent.com>

This commit adds Cilium feature detection to the Cilium connectivity
test suite. Cilium features are things like L7 proxy status, chaining
mode, flow aggregation mode etc. Because some features are dependent on
run-time information like kernel versions, we prefer to collect the
feature status from `cilium status` where available. Other features are
currently detected by parsing the Cilium ConfigMap.

The current code assumes that the detected feature set is consistent
across all Cilium pods and clusters. If a discrepancy is detected, the
current code simply emits a warning and assumes the feature set from the
first Cilium pod probed.

Signed-off-by: Sebastian Wicki <sebastian@isovalent.com>

This commit switches the flow aggregation detection to use the newly
introduced Cilium feature set. This commit should introduce no
functional changes.

The flow aggregation log line is moved to a later stage ensure feature
detection has been run before we print the status.

Signed-off-by: Sebastian Wicki <sebastian@isovalent.com>

This commit introduces a new function to the connectivity test framework
to specify feature requirements for certain tests. All tests requiring
the L7 proxy are updated to use the new requirements framework to skip
those tests if the L7 proxy is not available.

Signed-off-by: Sebastian Wicki <sebastian@isovalent.com>

Testing (*FeatureSet).MatchRequirements for now.

Adresses #998 (comment)

Signed-off-by: Tobias Klauser <tobias@cilium.io>

This might be useful in CI to catch issues with feature detection.

Signed-off-by: Tobias Klauser <tobias@cilium.io>