[chore] Update for 0.120.0 (#5946)

Author: dmitryax

CHANGELOG.md

@@ -10,6 +10,29 @@ This Splunk OpenTelemetry Collector release includes changes from the [opentelem
 
 - (Contrib) `receiver/prometheus`: Prometheus receiver now uses scrapers in Prometheus 3.0. ([#36873](https://github.com/open-telemetry/opentelemetry-collector-contrib/pull/36873))
   There are a number of breaking changes in Prometheus 3.0. Learn more about those changes and migration guide on https://prometheus.io/docs/prometheus/latest/migration/.
+  As a result of [adding support for UTF-8 names](https://prometheus.io/docs/prometheus/latest/migration/#utf-8-names),
+  the metrics and labels containing UTF-8 characters are no longer escaped. Consequently, the dots (.) in internal
+  collector metrics and resource attributes scraped by Prometheus are no longer replaced with underscores (_).
+  - The `service_name`, `service_instance_id`, and `service_version` resource attributes are now scraped as
+    `service.name`, `service.instance.id`, and `service.version`, respectively.
+  - The following metrics containing dots reported by several components are no longer escaped:
+    - `filter` processor:
+      - `processor_filter_datapoints_filtered` -> `processor_filter_datapoints.filtered`
+      - `processor_filter_logs_filtered` -> `processor_filter_logs.filtered`
+      - `processor_filter_spans_filtered` -> `processor_filter_spans.filtered`
+    - `deltatocumulative` processor:
+      - `deltatocumulative_streams_tracked` -> `deltatocumulative.streams.tracked`
+      - `deltatocumulative_streams_tracked_linear` -> `deltatocumulative.streams.tracked.linear`
+      - `deltatocumulative_streams_limit` -> `deltatocumulative.streams.limit`
+      - `deltatocumulative_streams_evicted` -> `deltatocumulative.streams.evicted`
+      - `deltatocumulative_streams_max_stale` -> `deltatocumulative.streams.max_stale`
+      - `deltatocumulative_datapoints_processed` -> `deltatocumulative.datapoints.processed`
+      - `deltatocumulative_datapoints_dropped` -> `deltatocumulative.datapoints.dropped`
+      - `deltatocumulative_datapoints_linear` -> `deltatocumulative.datapoints.linear`
+      - `deltatocumulative_gaps_length` -> `deltatocumulative.gaps.length`
+    - `googlecloudpubsub` receiver:
+      - `receiver_googlecloudpubsub_stream_restarts` -> `receiver.googlecloudpubsub.stream_restarts`
+
 - (Contrib) `activedirectorydsreceiver`: Fixed typo in the attribute `distingushed_names`, renaming it to `distinguished_names`. ([#37606](https://github.com/open-telemetry/opentelemetry-collector-contrib/pull/37606))
 - (Contrib) `receiver/hostmetrics`: Remove receiver.hostmetrics.normalizeProcessCPUUtilization feature gate ([#34763](https://github.com/open-telemetry/opentelemetry-collector-contrib/pull/34763))
 - (Contrib) `tailsamplingprocessor`: Fix the decision timer metric to capture longer latencies beyond 50ms. ([#37722](https://github.com/open-telemetry/opentelemetry-collector-contrib/pull/37722))