[docs] Split up multi-command Flink SQL code listings into separate code listings

[michaelkoepf]

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• I searched in the issues and found nothing similar.

Motivation

Some Flink SQL code blocks in the docs contain multiple commands in a single code listing. However, the Flink SQL CLI allows only one command at once, which does not allow users to user the copy-paste feature of code listigns. We should split up mutli-command Flink SQL code listings into separate code listings (one per command as done for the quick start guide here).

Solution

No response

Anything else?

No response

Willingness to contribute

• I'm willing to submit a PR!