Fix cygpath missing error in virtualenv activate script

[zanieb]

Closes #10487

&> is not supported by all shells... but I'm confused how that would cause that behavior still.

Adding the following to the Dockerfile fixes the error

RUN sed -i 's/command -v cygpath \&> \/dev\/null/command -v cygpath > \/dev\/null 2>\&1/' $VENV_DIR/bin/activate

Interestingly

❯ docker run --platform linux/amd64 -it public.ecr.aws/p3v4g4o2/reflex-cloud-base:v0.0.7-py3.12 \
    /bin/sh -c 'command -v cygpath &> /dev/null; echo $?'
0

❯ docker run --platform linux/amd64 -it public.ecr.aws/p3v4g4o2/reflex-cloud-base:v0.0.7-py3.12 \
    /bin/sh -c 'command -v cygpath > /dev/null 2>&1; echo $?'
127

❯ docker run --platform linux/amd64 -it public.ecr.aws/p3v4g4o2/reflex-cloud-base:v0.0.7-py3.12 \
    /bin/sh -c 'command -v cygpath; echo $?'
127

❯ docker run --platform linux/amd64 -it public.ecr.aws/p3v4g4o2/reflex-cloud-base:v0.0.7-py3.12 \
    /bin/sh -c '{ [ "$OSTYPE" = "cygwin" ] || [ "$OSTYPE" = "msys" ]; }; echo $?'
1

❯ docker run --platform linux/amd64 -it public.ecr.aws/p3v4g4o2/reflex-cloud-base:v0.0.7-py3.12 \
    /bin/sh -c '{ [ "x$OSTYPE" = "cygwin" ] || [ "x$OSTYPE" = "msys" ]; } && command -v foobar &> /dev/null && echo "hi"; echo $?'
hi
0

[zanieb]

There are other problems though, e.g., #10498