[Python Lambda SDK] Remove wrapt dependency

Related issues https://linear.app/serverless/issue/SC-606/python-sdk-very-large-extension-layer-size & https://linear.app/serverless/issue/SC-593/python-sdk-big-latency-overhead
Related PR https://github.com/serverless/console/pull/731
We were using wrapt when instrumenting 3rd party libraries, we only use a small functionality which is easy to implement and save some space and performance by not importing wrapt.

Unit/integration tested.

serverless / dashboard