Remove duplicate pip installs, centalize all dependancy information

Dockerfile

@@ -29,9 +29,6 @@ RUN [ -e /tmp/build_dep.txt ] && \
     apt-get -qq update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends $(cat /tmp/build_dep.txt | grep -o '^[^#]*') && \
     apt-get clean && \
-    python3 -m pip install --upgrade --no-cache-dir pip && \
-    python3 -m pip install --upgrade --no-cache-dir "cffi>1.14.3" && \
-    python3 -m pip install --upgrade --no-cache-dir "capstone" && \
     curl https://sh.rustup.rs -sSf | sh -s -- -y --profile minimal
 
 # Then install capstone from source
@@ -91,7 +88,6 @@ RUN  make -C /panda/build install && \
 # Install pypanda
 RUN cd /panda/panda/python/core && \
     PRETEND_VERSION=$(cat /tmp/savedversion) python3 setup.py install
-RUN python3 -m pip install --ignore-install pycparser && python3 -m pip install --force-reinstall --no-binary :all: cffi
 # Build a whl too
 RUN cd /panda/panda/python/core && \
     PRETEND_VERSION=$(cat /tmp/savedversion) python3 setup.py bdist_wheel

panda/dependencies/ubuntu_18.04_base.txt

@@ -18,11 +18,14 @@ unzip
 # pyperipheral (only needed for armel)
 libpython3-dev
 
-# pypanda dependencies
+# panda python dependencies
 genisoimage
 libffi-dev
 python3-protobuf
 python3-colorama
+python3-capstone
+python3-pycparser
+python3-cffi
 
 # apt-rdepends qemu-system-common
 acl

panda/dependencies/ubuntu_20.04_base.txt

@@ -17,11 +17,14 @@ wget
 # pyperipheral (only needed for armel)
 libpython3-dev
 
-# pypanda dependencies
+# panda python dependencies
 genisoimage
 libffi-dev
 python3-protobuf
 python3-colorama
+python3-capstone
+python3-pycparser
+python3-cffi
 
 # Not sure what this one is needed for
 liblzo2-2

panda/dependencies/ubuntu_22.04_base.txt

@@ -17,11 +17,14 @@ wget
 # pyperipheral (only needed for armel)
 libpython3-dev
 
-# pypanda dependencies
+# panda python dependencies
 genisoimage
 libffi-dev
 python3-protobuf
 python3-colorama
+python3-capstone
+python3-pycparser
+python3-cffi
 
 # Not sure what this one is needed for
 liblzo2-2

panda/scripts/install_ubuntu.sh

@@ -126,11 +126,6 @@ if [[ !$(dpkg -l | grep -q libosi) ]]; then
   popd
 fi
 
-# PyPANDA needs CFFI from pip (the version in apt is too old)
-# Install system-wide since PyPANDA install will also be system-wide
-$SUDO python3 -m pip install pip
-$SUDO python3 -m pip install "cffi>1.14.3"
-
 progress "Trying to update DTC submodule"
 git submodule update --init dtc || true