Smart Agent log receiver

[rmfitzpatrick]

(In lieu of #149)

These changes allow the Smart Agent receiver to act as both a metrics and logs receiver, as well as removing the notion of an event client in config and Output functionality. Instead they use standard log pipelines after I discovered that the main user of events in the agent, the processlist monitor, requires a host dimension that must be added via processor in a log pipeline unless hardcoded in agent config (open-telemetry/opentelemetry-collector-contrib#2631 is necessary in SFx exporter for this to take effect).

Also includes the basic SFx exporter dimension client defaulting logic, which is simpler without event clients.

[codecov]

Codecov Report

Merging #161 (130b5d3) into main (ed2f46c) will decrease coverage by 0.32%.
The diff coverage is 95.89%.

@@            Coverage Diff             @@
##             main     #161      +/-   ##
==========================================
- Coverage   88.94%   88.62%   -0.33%     
==========================================
  Files          16       16              
  Lines         932      958      +26     
==========================================
+ Hits          829      849      +20     
- Misses         73       76       +3     
- Partials       30       33       +3     

Impacted Files	Coverage Δ
internal/receiver/smartagentreceiver/config.go	93.47% <ø> (-0.21%)	⬇️
internal/receiver/smartagentreceiver/output.go	92.15% <93.02%> (-5.76%)	⬇️
internal/receiver/smartagentreceiver/factory.go	100.00% <100.00%> (ø)
internal/receiver/smartagentreceiver/receiver.go	90.72% <100.00%> (+0.50%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ed2f46c...130b5d3. Read the comment docs.

[tigrannajaryan]

So, just to clarify. The logs pipeline is required for events to work, correct?
Do we want to document which monitors require it?

[rmfitzpatrick]

Yes, it's required and I will provide a list of dimension update and event using monitors w/ my next full documentation PR.