Update module name to be consistent with other elastic projects #261
Description
The current module path is elastic/apm-lambda-extension (https://github.com/elastic/apm-aws-lambda/blob/main/apm-lambda-extension/go.mod#L1)
It should be update to follow best practice and be consistent with other elastic projects.
See https://github.com/elastic/apm-agent-go/blob/main/go.mod#L1
See https://github.com/elastic/beats/blob/main/go.mod#L1
See https://github.com/elastic/go-elasticsearch/blob/main/go.mod#L1