Add example folder with common values.yaml scenarios

[TylerHelmuth]

It would be nice to have some example values.yaml for common scenarios customers might have. Some scenarios could be:

• agent only configuration
• standalone only configuration
• agent and standalone
• Traces only
• Metrics only
• Logs only
• Common receivers (hostmetrics?)
• Common processors (resourceprocessor or k8sattributeprocessor?)
• Proxy configuration

Could be worth combining certain examples so we don't have too many values.yaml to maintain on breaking changes.

[TylerHelmuth]

Working on this

[TylerHelmuth]

I think this is blocked by #90. I wanted to create an agent example with only the metrics pipeline but can't overwrite the default config so that trace and logs are excluded.

[TylerHelmuth]

Narrowing the scope of this to only

• agent only configuration
• standalone only configuration
• agent and standalone

while we work towards #91