Increasing Read timeout for lambda in IT tests (#1051)

# Task Branch Pull Request

**<https://nhsd-jira.digital.nhs.uk/browse/DS-3685>**

## Description of Changes

Please include a summary of the change

## Type of change

Delete not appropriate

- Bug fix (non-breaking change which fixes an issue)
- New feature (non-breaking change which adds functionality)
- Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- Refactoring (non-breaking change which improves the structure of the
code)

## Development Checklist

- [x] I have performed a self-review of my own code
- [x] Tests have added that prove my fix is effective or that my feature
works (Integration tests)
- [x] I have updated Dependabot to include my changes (if applicable)

## Code Reviewer Checklist

- [x] I can confirm the changes have been tested or approved by a tester

Author: nsindhu26

test/integration/steps/functions/aws/aws_lambda.py

@@ -11,7 +11,7 @@
 
 cfg = botocore_config.Config(
     retries={"max_attempts": 0},
-    read_timeout=900,
+    read_timeout=1000,
     connect_timeout=900,
 )
 LAMBDA_CLIENT_FUNCTIONS = client("lambda", config=cfg)