Python lambda is 2.6mb when there is 0 dependencies

**Describe the bug**
When create a function with a very simple Python lambda, the generated lambda is 2MB

**Amplify CLI Version**

4.30.0

**To Reproduce**

Take pointless lambda like this and build it.

```python3
def handler(event, context):
print("event:", event)
```

**Expected behavior**
The deployed lambda should only be a couple bytes not 2.6mb

**Screenshots**


**Desktop (please complete the following information):**
- OS: [e.g. Mac/Windows/Ubuntu]
Mac
- Node Version. You can use `node -v` to check the node version on your system
v14.13.1

**Additional context**
Add any other context about the problem here.

Reproduce the issue with the shown Python handler and Amplify CLI version 4.30.0, then inspect the generated Lambda artifact and the packaging path that produces it. Done means a dependency-free handler is deployed as a substantially smaller artifact rather than approximately 2.6 MB, with the behavior covered by an appropriate test if the project has one.

Written by the indexing model from the issue text.