Initial version

[eh-am]

Initial version of the pyroscope lambda extension.

It works as follows:

• The user set up integrations as normally (https://pyroscope.io/docs/supported-integrations/), only requirement is to set the ServerAddressfield to http://localhost:4040 (which is where the relay server is running)
• The relay server immediately responds with ok, and then tries to upload that to the real remote service (specified by the PYROSCOPE_REMOTE_ADDRESS env var)

This is done so that the lambda function latency is small (ie it responds fast).