Rename script to build for consistency

All our other helper build scripts are simply called `build`. So now
that this is the only python build script, we no longer need to
disambiguate it from the other build script... so let's also rename it
to just `build` for consistency with the other ecosystems.

Split out as a separate commit from the prior one in order to make the
`git` trail easier to follow.

python/Dockerfile

@@ -56,25 +56,25 @@ RUN git -c advice.detachedHead=false clone https://github.com/pyenv/pyenv.git --
 
 FROM python-core as python-3.10
 RUN pyenv install $PY_3_10 \
-  && bash /opt/python/helpers/build_for_version $PY_3_10 \
+  && bash /opt/python/helpers/build $PY_3_10 \
   && cd /usr/local/.pyenv \
   && tar czf 3.10.tar.gz versions/$PY_3_10
 
 FROM python-core as python-3.9
 RUN pyenv install $PY_3_9 \
-  && bash /opt/python/helpers/build_for_version $PY_3_9 \
+  && bash /opt/python/helpers/build $PY_3_9 \
   && cd /usr/local/.pyenv \
   && tar czf 3.9.tar.gz versions/$PY_3_9
 
 FROM python-core as python-3.8
 RUN pyenv install $PY_3_8 \
-  && bash /opt/python/helpers/build_for_version $PY_3_8 \
+  && bash /opt/python/helpers/build $PY_3_8 \
   && cd /usr/local/.pyenv \
   && tar czf 3.8.tar.gz versions/$PY_3_8
 
 FROM python-core as python-3.7
 RUN pyenv install $PY_3_7 \
-  && bash /opt/python/helpers/build_for_version $PY_3_7 \
+  && bash /opt/python/helpers/build $PY_3_7 \
   && cd /usr/local/.pyenv \
   && tar czf 3.7.tar.gz versions/$PY_3_7
 
@@ -125,7 +125,7 @@ ENV DEPENDABOT_NATIVE_HELPERS_PATH="/opt"
 RUN git -c advice.detachedHead=false clone https://github.com/pyenv/pyenv.git --branch $PYENV_VERSION --single-branch --depth=1 /usr/local/.pyenv
 RUN pyenv install $PY_3_11 \
   && pyenv global $PY_3_11 \
-  && bash /opt/python/helpers/build_for_version $PY_3_11
+  && bash /opt/python/helpers/build $PY_3_11
 
 COPY --from=python-3.10 /usr/local/.pyenv/3.10.tar.gz /usr/local/.pyenv/3.10.tar.gz
 COPY --from=python-3.9 /usr/local/.pyenv/3.9.tar.gz /usr/local/.pyenv/3.9.tar.gz