CICD Integration test: iam client fix (data-dot-all#1604)

### Feature or Bugfix
<!-- please choose -->
- Bugfix

### Detail
- iam client tries to get_role and creates one if it's none.

### Relates
- <URL or Ticket>

### Security
Please answer the questions below briefly where applicable, or write
`N/A`. Based on
[OWASP 10](https://owasp.org/Top10/en/).

- Does this PR introduce or modify any input fields or queries - this
includes
fetching data from storage outside the application (e.g. a database, an
S3 bucket)?
  - Is the input sanitized?
- What precautions are you taking before deserializing the data you
consume?
  - Is injection prevented by parametrizing queries?
  - Have you ensured no `eval` or similar functions are used?
- Does this PR introduce any functionality or component that requires
authorization?
- How have you ensured it respects the existing AuthN/AuthZ mechanisms?
  - Are you logging failed auth attempts?
- Are you using or adding any cryptographic features?
  - Do you use a standard proven implementations?
  - Are the used keys controlled by the customer? Where are they stored?
- Are you introducing any new policies/roles/users?
  - Have you used the least-privilege principle? How?


By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.

---------

Co-authored-by: Sofia Sazonova <[email protected]>

tests_new/integration_tests/aws_clients/iam.py

@@ -16,8 +16,12 @@ def __init__(self, session=boto3.Session(), region=os.environ.get('AWS_REGION',
         self._region = region
 
     def get_role(self, role_name):
-        role = self._client.get_role(RoleName=role_name)
-        return role
+        try:
+            role = self._client.get_role(RoleName=role_name)
+            return role
+        except self._client.exceptions.NoSuchEntityException as e:
+            log.info(f'Error occurred: {e}')
+            return None
 
     def delete_role(self, role_name):
         self._client.delete_role(RoleName=role_name)