GitLab CI - Use specific keyword in jobs

I have a problem with GitLab CI (maybe I try to use it in the wrong way). I have templates with artifacts and jobs that are used templates with artifacts but the value expire_in should be used only on a specific branch e.g.

template:

.build_template: &artifactsTMP
    artifacts:
        paths:
            - test.py
        expire_in: 3 minutes

jobs

firstJob:
  stage: build
  <<: *artifactsTMP
  script:
      - echo "sth"
  rules:
    - If: $CI_COMMIT_BRANCH == "dev"

secondJob:
  stage: build
  <<: *artifactsTMP
  script:
      - echo "sth"

What I want to do is that expire_in should be run only on branch "dev". I tried to use the IF statement inside artifacts and rules but it was not working. Is there any option to add the expire_in during job execution?

For example:

template:

.build_template: &artifactsTMP
    artifacts:
        paths:
            - test.py

jobs:

firstJob:
  stage: build
  <<: *artifactsTMP
  script:
      - echo "sth"
  rules:
    - If: $CI_COMMIT_BRANCH == "dev"

secondJob:
  stage: build
  <<: *artifactsTMP
  >>ADD HERE expire_in: 5 minutes<<
  script:
      - echo "sth"

Is there any change to do that or just simply I should create two templates, one without expire_in second with expire_in