malformed documents log too much

[fulmicoton]

Every single malformed doc logs a warning in the doc processor. We need a way to make sure we log at most N docs per minutes for this.

This ended up causing #4460.

This can be tested easily with ./simian "abu(rate=20mb)" --endpoint localhost:7280

The solution needs to be "frugal".

[fulmicoton]

We have another risky call site. When the WAL is full we log a warning every try sends an ingest request.

[fulmicoton]

@trinity-1686a can you take of the PR. You can either use vector's solution, cook your own, or use a macro with a static as you suggested.

I kind of like the idea of the macro.