feat: replace grafana-agent to otel

DEVELOPMENT.md

@@ -25,22 +25,18 @@ tox                      # run 'lint' and 'unit' environments
 
 ## Fetching libraries
 
-Charm libraries are managed with charmcraft and recorded in `./scripts/update-charm-libs.sh`.
-
 To update the libraries included, run
 
 ```shell
-./scripts/update-charm-libs.sh
+charmcraft fetch-libs
 ```
 
-If you need to include more charm libraries, you can run:
+If you need to include more charm libraries, you can add the new lib in the `charm-libs` section in charmcraft.yaml and run:
 
 ```shell
-charmcraft fetch-lib <operator-libs>
+charmcraft fetch-libs
 ```
 
-And add the corresponding command to `./scripts/update-charm-libs.sh`.
-
 ## Checking for dashboard and alert rule updates
 
 The openstack exporter dashboards and alert rules are managed

charmcraft.yaml

@@ -72,6 +72,11 @@ config:
 
         If the snap file has been attached via the openstack-exporter resource, this option has no effect.
 
+charm-libs:
+  - lib: grafana-agent.cos_agent
+    version: "0"
+  - lib: operator-libs-linux.snap
+    version: "2"
 
 links:
   documentation: https://discourse.charmhub.io/t/openstack-exporter-docs-index/13876