fix: handle repetitive prompt patterns OpenAI error

[Patai5]

fixes issues opened by some users:
https://console.apify.com/actors/paOtbjvyUiNsr1Qms/issues/weHU20mzDyo4acWxN
https://console.apify.com/actors/paOtbjvyUiNsr1Qms/issues/8LbRwYD6M76m2RiVu

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This error is not documented in the OpenAI errors and there are only a few instances of it on the internet.
Basically OpenAI is trying to save credits of programmers who use repetitive and useless tokens in their inputs, i.e. wasting their prompt token usage.
Unfortunately there doesn't seems to be any way to disable this... we simply have to skip GPT processing for requests that get this response.
Ultimately our users will have to identify what is repetitive on webpages they are trying to scrape and remove those elements using removeElementsCssSelector input option.

[metalwarrior665]

Thanks. Let's see how the users will respond to this. To be honest, I could see leaving the previous behavior as well since it will often happen on big part of the scraped domain so we could be running quite a lot of blank pages. Let's see