Add metricsgenerationprocessor to otelcol-k8s distribution (#1388)

* Add metricsgenerationprocessor to otelcol-k8s distribution

The metricsgeneration processor is needed for common Kubernetes monitoring
use cases like computing node CPU/memory usage percentages from kubeletstats
metrics (e.g. dividing raw usage by node allocatable values).

Without it, users of the k8s distribution (including the opentelemetry-kube-stack
Helm chart) must override to the significantly larger otel/opentelemetry-collector-contrib
image just to get this single processor.

* Add issue number to changelog entry for chlog-validate

---------

Co-authored-by: Moritz Wiesinger <6901203+mowies@users.noreply.github.com>

Author: dpacheconr

.chloggen/add-metricsgenerationprocessor-k8s.yaml

@@ -0,0 +1,25 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: otelcol-k8s
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Add metricsgenerationprocessor to the otelcol-k8s distribution
+
+# One or more tracking issues or pull requests related to the change
+issues: [1388]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

distributions/otelcol-k8s/manifest.yaml

@@ -46,6 +46,7 @@ processors:
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/intervalprocessor v0.147.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/k8sattributesprocessor v0.147.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/logdedupprocessor v0.147.0
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/metricsgenerationprocessor v0.147.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/metricstransformprocessor v0.147.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/probabilisticsamplerprocessor v0.147.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/redactionprocessor v0.147.0