Drop obsolete vector-test CI pipeline (#505)

Vector is being removed from the logging stack in favour of a VictoriaLogs VLAgent, so every path this pipeline tests is going away and the pipeline becomes dead weight.

- Delete `.woodpecker/vector-test.yaml`.

Companion PR removes the vector manifests under `apps/base/logging/vector/`.

Reviewed-on: #505
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>

.woodpecker/vector-test.yaml

@@ -1,29 +0,0 @@
-when:
-  - event: pull_request
-
-steps:
-  - name: vector-test
-    image: artifactapi.k8s.syd1.au.unkin.net/dockerhub/timberio/vector:0.57.0-debian
-    commands:
-      # Dummy creds + writable dirs so the full topologies build; the unit tests
-      # only exercise the transforms (sources are not started).
-      - export CLICKHOUSE_USER=ci CLICKHOUSE_PASSWORD=ci
-      - export NATS_PRODUCER_PASSWORD=ci NATS_CONSUMER_PASSWORD=ci
-      - mkdir -p /vector-data-dir /etc/vault-ca
-      - cp /etc/ssl/certs/ca-certificates.crt /etc/vault-ca/ca.crt
-      # Transform tier + VM ingest: unit-tested transforms.
-      - vector test apps/base/logging/vector/aggregator.yaml apps/base/logging/vector/aggregator-tests.yaml
-      - vector test apps/base/logging/vector/vm-ingest.yaml apps/base/logging/vector/vm-ingest-tests.yaml
-      # Agent has no transforms to unit-test; validate it builds. (The archiver
-      # leg is now the logarchiver service, not a Vector pipeline.)
-      - vector validate --no-environment apps/base/logging/vector/agent.yaml
-    backend_options:
-      kubernetes:
-        serviceAccountName: default
-        resources:
-          requests:
-            memory: 256Mi
-            cpu: 250m
-          limits:
-            memory: 1Gi
-            cpu: 1