pyroscope.scrape does not allow reliably to override __profile_path__ label

[korniltsev]

What's wrong?

The component appends a __profile_path__ label, without checking if it already exists in the target. This results in target having two labels with the same name and different values. The order of the equal labels is likely not determined because of unstable sort used later.

Related to #2597

Steps to reproduce

Have a target with __profile_path__ label as an argument.

System information

No response

Software version

c6d62ec

Configuration

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