clean out old approach with setting reference branch

  LTV_DIR: "/usr/local/ltv"

  EVS_BE_TEST_DIR_BASOP: "/usr/local/be_2_evs_basop"

  REFERENCE_BRANCH: "ivas-float-update"

  # this is intentionally set to a nonsense value to trigger a clear error if there is a flaw in the variable setting logic

  REFERENCE_BRANCH_LOCAL: "xa34wshgaweedfaerssfgsfdg"

  BUILD_OUTPUT: "build_output.txt"

  SCRIPTS_DIR: "/usr/local/scripts"

  EXIT_CODE_NON_BE: 123

.build-reference-and-dut-binaries: &build-reference-and-dut-binaries

  - current_commit_sha=$(git rev-parse HEAD)

  ### build reference binaries

  - git checkout $REFERENCE_BRANCH_LOCAL

  # safeguard check to detect possible mistakes in the reference branch selection logic

  - if [ "$?" != "0" ]; then

  -     echo "REFERENCE_BRANCH_LOCAL variable is set incorrectly ($REFERENCE_BRANCH_LOCAL)!"

  -     exit 1

  - fi

  - git checkout $REFERENCE_BRANCH

  - git pull

  - make clean

  - make -j

    -    testcase_timeout=$TESTCASE_TIMEOUT_STV

    - fi

    - if [ $CI_PIPELINE_SOURCE == "web" || $CI_PIPELINE_SOURCE == "schedule" ]; then

    -    REFERENCE_BRANCH_LOCAL="$REFERENCE_BRANCH"

    - fi

    - python3 ci/remove_unsupported_testcases.py $PRM_FILES

    - if [ $LEVEL_SCALING != "1.0" ];then

    -   *apply-testv-scaling