Dockerfile: lock poetry installation to v2.0.1

This avoids the docker image builders breaking with:
ERROR [linux/amd64 builder 15/17] RUN poetry export -o requirements.txt --without-hashes
0.780 pyproject.toml changed significantly since poetry.lock was last generated. Run Resolving dependencies... to fix the lock file.

This occurred when the default installation version changed underneath us.

Changelog-None

Author: endothermicdev

Dockerfile

@@ -90,7 +90,8 @@ RUN apt-get update -qq && \
         tclsh
 
 ENV PATH="/root/.local/bin:$PATH" \
-    PYTHON_VERSION=3
+    PYTHON_VERSION=3 \
+    POETRY_VERSION=2.0.1
 RUN curl -sSL https://install.python-poetry.org | python3 - && \
     poetry self add poetry-plugin-export
 RUN mkdir -p /root/.venvs && \

contrib/reprobuild/Dockerfile.focal

@@ -49,7 +49,7 @@ RUN git clone https://github.com/pyenv/pyenv.git /root/.pyenv && \
 
 RUN wget https://bootstrap.pypa.io/get-pip.py -O /tmp/get-pip.py && python3 /tmp/get-pip.py \
     && rm /tmp/get-pip.py \
-    && pip install poetry mako grpcio-tools==1.62.2 && \
+    && pip install poetry==2.0.1 mako grpcio-tools==1.62.2 && \
     poetry self add poetry-plugin-export
 
 RUN wget https://sh.rustup.rs -O rustup-install.sh && \

contrib/reprobuild/Dockerfile.jammy

@@ -47,7 +47,7 @@ RUN git clone https://github.com/pyenv/pyenv.git /root/.pyenv && \
 
 RUN wget https://bootstrap.pypa.io/get-pip.py -O /tmp/get-pip.py && python3 /tmp/get-pip.py \
     && rm /tmp/get-pip.py \
-    && pip install poetry mako grpcio-tools && \
+    && pip install poetry==2.0.1 mako grpcio-tools && \
     poetry self add poetry-plugin-export
 
 RUN wget https://sh.rustup.rs -O rustup-install.sh && \

contrib/reprobuild/Dockerfile.noble

@@ -45,7 +45,7 @@ RUN git clone https://github.com/pyenv/pyenv.git /root/.pyenv && \
 
 RUN wget https://bootstrap.pypa.io/get-pip.py -O /tmp/get-pip.py && python3 /tmp/get-pip.py \
     && rm /tmp/get-pip.py \
-    && pip install poetry mako grpcio-tools && \
+    && pip install poetry==2.0.1 mako grpcio-tools && \
     poetry self add poetry-plugin-export
 
 RUN wget https://sh.rustup.rs -O rustup-install.sh && \