Revert "Remove numpy armv7l lock since wheels are now available"

This reverts commit 04409602a6.

docker/Dockerfile.armhf

@@ -36,9 +36,9 @@ ENV LD_LIBRARY_PATH /usr/local/lib
 # Install dependencies
 COPY --chown=ftuser:ftuser requirements.txt /freqtrade/
 USER ftuser
-RUN  pip install --user --no-cache-dir numpy \
+RUN  pip install --user --no-cache-dir numpy==1.25.2 \
   && pip install --user /tmp/pyarrow-*.whl \
-  && pip install --user TA-Lib==0.4.28 \
+  && pip install --user --no-build-isolation TA-Lib==0.4.28 \
   && pip install --user --no-cache-dir -r requirements.txt
 
 # Copy dependencies to runtime-image

requirements.txt

@@ -1,4 +1,5 @@
-numpy==1.26.0
+numpy==1.26.0; platform_machine != 'armv7l'
+numpy==1.25.2; platform_machine == 'armv7l'
 pandas==2.0.3
 pandas-ta==0.3.14b