ecr-access job: fix slack notification in case of failure

[paulineribeyre]

Before:

  File "/home/ubuntu/cloud-automation/files/scripts/ecr-access-job.py", line 46, in get_configs
    raise Exception("Missing 'ECR_ACCESS_JOB_ARN' environment variable")
Exception: Missing 'ECR_ACCESS_JOB_ARN' environment variable

After:

  File "/home/ubuntu/cloud-automation/files/scripts/ecr-access-job.py", line 46, in get_configs
    raise Exception("Missing 'ECR_ACCESS_JOB_ARN' environment variable")
Exception: Missing 'ECR_ACCESS_JOB_ARN' environment variable
Failure - Exit code: 1
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    92  100     2  100    90      8    365 --:--:-- --:--:-- --:--:--   373

After in case of success:

Success - Exit code: 0
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    92  100     2  100    90      7    352 --:--:-- --:--:-- --:--:--   362

New Features

Breaking Changes

Bug Fixes

Improvements

Dependency updates

Deployment changes