chore: remove --no-build-isolation from docker builds

Author: xmatthias

Dockerfile

@@ -44,7 +44,7 @@ USER ftuser
 # Install and execute
 COPY --chown=ftuser:ftuser . /freqtrade/
 
-RUN pip install -e . --user --no-cache-dir --no-build-isolation \
+RUN pip install -e . --user --no-cache-dir \
   && mkdir /freqtrade/user_data/ \
   && freqtrade install-ui
 

docker/Dockerfile.armhf

@@ -49,7 +49,7 @@ USER ftuser
 # Install and execute
 COPY --chown=ftuser:ftuser . /freqtrade/
 
-RUN pip install -e . --user --no-cache-dir --no-build-isolation\
+RUN pip install -e . --user --no-cache-dir \
   && mkdir /freqtrade/user_data/ \
   && freqtrade install-ui