Add Validate to configmodels interfaces (e.g. configmodels.Processor)

[bogdandrutu]

In order for the collector to be able to verify the config without creating components we need to validate every config before calling New on the factory.

This way we can add a flag like "--dry-run" that verifies the configuration, also we can ensure that we fail fast, etc.

[alolita]

@bogdandrutu can you please assign @mxiamxia to this issue. I don't have rights to assign.

When the Collector is initialized, there is already basic configuration validation. Can you provide more detail on what else needs to be added for verification?

[bogdandrutu]

Few things here:

1. @mxiamxia is not part of opentelemetry org which you should fix. Cannot assign to him unless he comments on this issue otherwise.
2. I am talking about adding this func to the configmodels.[Receiver|Exporter|Processor|Extension] so components can provide custom verification logic for their own config.

[alolita]

@mxiamxia See #2597 too.