Resolve "Check for master and dev branches being protected"

Closes #147 (closed)

This MR checks whether master/development branches are protected in the lint stage and outputs an appropriate error message.

Successful pipeline tests:

• https://repo1.dso.mil/dsop/opensource/pipeline-test-project/ubi8-minimal/-/jobs/1592127 (development, unprotected)
• https://repo1.dso.mil/dsop/opensource/pipeline-test-project/ubi8-minimal/-/jobs/1592145 (development, protected)
• https://repo1.dso.mil/dsop/opensource/pipeline-test-project/ubi8-minimal/-/jobs/1592325 (master, unprotected)
• https://repo1.dso.mil/dsop/opensource/pipeline-test-project/ubi8-minimal/-/jobs/1592262 (master, protected)
• https://repo1.dso.mil/dsop/opensource/pipeline-test-project/ubi8-minimal/-/jobs/1592498 (feature branch, unprotected)