test(itest): enable jfr-datasource recording upload test

[andrewazores]

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Related to #42

Description of the change:

Re-enables the UploadRecordingIT with some modifications.

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[lkonno]

@andrewazores I think that you can keep UploadRecordingTest disabled, I will fix it after this update.

[andrewazores]

integration tests seem to work fine locally but are consistently failing in CI. I'll look into why and ping you again for review @lkonno when I figure it out.

[andrewazores]

@lkonno the RulesPostJsonIT was already a little flakey before but somehow it seems to have become flakier with the changes to the StandardSelfTest base. I'll try to investigate that separately later on.

[lkonno]

LGTM

[andrewazores]

@lkonno I think this is properly cleaned up now.