feat(appsec): enable Exploit Prevention in Lambda (#14827)

## Description

Stop explicitely disabling Exploit Prevention in AWS Lambda

## Testing

system-tests for lambda are passing using local builds with
DataDog/system-tests#5505 and will be enabled
after this PR is merged.

## Risks

None

## Additional Notes

<!-- Any other information that would be helpful for reviewers -->

Author: florentinl

ddtrace/settings/asm.py

@@ -272,7 +272,6 @@ def __init__(self):
 
             # Disable all features that are not supported in Lambda
             tracer_config._remote_config_enabled = False
-            self._ep_enabled = False
             self._iast_supported = False
 
         if not self._iast_supported: