Backport PR #50341 on branch 1.5.x (CI: Use regular solver for docker build) (#50422)

Backport PR #50341: CI: Use regular solver for docker build

Co-authored-by: Patrick Hoefler <[email protected]>

Author: meeseeksmachine

Dockerfile

@@ -8,6 +8,6 @@ RUN apt-get install -y build-essential
 RUN apt-get install -y libhdf5-dev
 
 RUN python -m pip install --upgrade pip
-RUN python -m pip install --use-deprecated=legacy-resolver \
+RUN python -m pip install \
     -r https://raw.githubusercontent.com/pandas-dev/pandas/main/requirements-dev.txt
 CMD ["/bin/bash"]