feat: Strip setuptools (DataDog#322)

version 4.71.0

Modify end time of lambda load span to be last cold start node's end_…

…time (DataDog#319)

* modify endtime of lambda load span to be the last cold start node endtime

fix the flaky test_exec_module_failure_case by enforcing the _cold_st…

…art= True (DataDog#311)

cold start tracing (python) (DataDog#299)

* (wip) coldstart tracing POC checkin

* feat: rename cold start span so it is nested properly.

* simplify how to wrap methods with push_node and pop_node and bug fixes

* remove cold_start_tracing file and use cold_start file

* add test_cold_start

* fix lint and integration tests

* make sure loader is Hashable in order to use in a set

* add logging, add default skip libs

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Co-authored-by: AJ Stuyvenberg <astuyve@gmail.com>

v4.67.0

update ddtrace 1.6.3 to 1.6.4 (DataDog#288)

* update ddtrace 1.6.3 to 1.6.4

* ran poetry update ddtrace

* poetry update (all dependencies)

use context.aws_request_id instead of http payload's requestId in the…

… spans' tags (DataDog#266)

Fix error when APIGateway headers are None (DataDog#259)

* Don't error when headers are None

* Fix formatting of file