[AIRFLOW-5687] Fix Upgrade pip to 19.0.2 in CI build pipeline (#6361)

(cherry picked from commit 489e7fe)

Dockerfile

@@ -293,7 +293,7 @@ COPY --chown=airflow:airflow airflow/bin/airflow ${AIRFLOW_SOURCES}/airflow/bin/
 # The goal of this line is to install the dependencies from the most current setup.py from sources
 # This will be usually incremental small set of packages in CI optimized build, so it will be very fast
 # In non-CI optimized build this will install all dependencies before installing sources.
-RUN pip install --no-use-pep517 -e ".[${AIRFLOW_EXTRAS}]"
+RUN pip install -e ".[${AIRFLOW_EXTRAS}]"
 
 
 WORKDIR ${AIRFLOW_SOURCES}/airflow/www_rbac
@@ -311,7 +311,7 @@ COPY --chown=airflow:airflow . ${AIRFLOW_SOURCES}/
 WORKDIR ${AIRFLOW_SOURCES}
 
 # Finally install the requirements from the latest sources
-RUN pip install --no-use-pep517 -e ".[${AIRFLOW_EXTRAS}]"
+RUN pip install -e ".[${AIRFLOW_EXTRAS}]"
 
 # Additional python deps to install
 ARG ADDITIONAL_PYTHON_DEPS=""