refactor(docker): Swap two RUN statements in pythonbuild

The installation of ScanCode's requirements installs the packaging
package version 21.3, see [1]. However, the recent Poetry versions
(`>= 1.8.0`) require a packaging version `>= 22.0`, see [2]. If that
isn't met, Poetry fails with [3].

Simply swap the `RUN` statements, so that the installation of
ScanCode's requirement does not downgrade the packaging package, as a
preparation for updating Poetry.

[1]: https://github.com/nexB/scancode-toolkit/blob/4f49985c26b6b8f951f116dfa3fe39ce27bd4ce8/requirements.txt#L44.
[2]: python-poetry/poetry#9029 (comment)
[3]: `No module named 'packaging.metadata'`

Signed-off-by: Frank Viernau <frank_viernau@epam.com>

Dockerfile

@@ -153,6 +153,15 @@ ARG PYTHON_POETRY_VERSION
 ARG PIPTOOL_VERSION
 ARG SCANCODE_VERSION
 
+RUN ARCH=$(arch | sed s/aarch64/arm64/) \
+    &&  if [ "$ARCH" == "arm64" ]; then \
+    pip install -U scancode-toolkit-mini==$SCANCODE_VERSION; \
+    else \
+    curl -Os https://raw.githubusercontent.com/nexB/scancode-toolkit/v$SCANCODE_VERSION/requirements.txt; \
+    pip install -U --constraint requirements.txt scancode-toolkit==$SCANCODE_VERSION; \
+    rm requirements.txt; \
+    fi
+
 RUN pip install --no-cache-dir -U \
     pip=="$PIPTOOL_VERSION" \
     wheel \
@@ -163,15 +172,6 @@ RUN pip install --no-cache-dir -U \
     poetry=="$PYTHON_POETRY_VERSION" \
     python-inspector=="$PYTHON_INSPECTOR_VERSION"
 
-RUN ARCH=$(arch | sed s/aarch64/arm64/) \
-    &&  if [ "$ARCH" == "arm64" ]; then \
-    pip install -U scancode-toolkit-mini==$SCANCODE_VERSION; \
-    else \
-    curl -Os https://raw.githubusercontent.com/nexB/scancode-toolkit/v$SCANCODE_VERSION/requirements.txt; \
-    pip install -U --constraint requirements.txt scancode-toolkit==$SCANCODE_VERSION; \
-    rm requirements.txt; \
-    fi
-
 FROM scratch AS python
 COPY --from=pythonbuild /opt/python /opt/python