[enhancement] Add spanmetrics connector and count connector to distribution

[greatestusername-splunk]

The purpose and use-cases

• spanmetrics connector: use-cases same as spanmetrics processor BUT the connector is much more straightforward to use and configure than the processor. The processor requires a set of "dummy" entries in the configs which can be confusing to configure. The connector does not require these "dummy" entries.
• count connector: Useful for doing basic metricization of logs, traces, spans, etc at the OTEL layer. This increases the capabilities of our distro and allows for basic metricization of logs before sending them on to other exporters. Currently I have been using this for metricizing GitLab webhook data and other CI/CD processes.

I'm happy to take this work on, along with updating docs and working with product docs teams to get those updated once the connectors are included in this distributions components.
Components would be added as to components.md as in development