remove use of ppa provided git in test-install-scripts.yml (#19395)

* remove use of ppa provided git in `test-install-scripts.yml`

* Update test-install-scripts.yml

Author: altendky

.github/workflows/test-install-scripts.yml

@@ -239,10 +239,6 @@ jobs:
         env:
           DEBIAN_FRONTEND: noninteractive
         run: |
-          # for bionic
-          apt-get --yes update
-          apt-get install --yes software-properties-common
-          add-apt-repository --yes ppa:git-core/ppa
           apt-get --yes update
           apt-get install --yes git lsb-release sudo
           MINIMUM=3.9