Agents should report supported components

[andykellr]

I'll describe this in the context of OpenTelemetry, but similar issues will exist for other agents.

OpenTelemetry distributions may have different components included during the build. Before sending a configuration to an agent, the management server will want to know what components are available. Sending a configuration with unsupported components will cause an error. It may be desirable to avoid errors and only allow configurations to be applied to agents that are able to use them.

This is similar to agent capabilities but will need more than a bitmask to support arbitrary component names and versions.

This is similar to what is available in component health, but components not in use (but still supported) would not be reported.

This is similar to package statuses but components are not necessarily packages.

This could be reported with remote configuration but doesn't feel right.