validate.sh: migrate 'setup.py develop' -> 'pip install -e'

This fixed deprecation warnings in console:
/home/buildbot/.venv/lib/python3.10/site-packages/setuptools/__init__.py:80: _DeprecatedInstaller: setuptools.installer and fetch_build_eggs are deprecated.
!!

        ********************************************************************************
        Requirements should be satisfied by a PEP 517 installer.
        If you are using pip, you can try `pip install --use-pep517`.
        ********************************************************************************

!!
  dist.fetch_build_eggs(dist.setup_requires)
/home/buildbot/.venv/lib/python3.10/site-packages/setuptools/command/develop.py:39: EasyInstallDeprecationWarning: easy_install command is deprecated.
!!

        ********************************************************************************
        Please avoid running ``setup.py`` and ``easy_install``.
        Instead, use pypa/build, pypa/installer or other
        standards-based tools.

        See pypa/setuptools#917 for details.
        ********************************************************************************

!!
  easy_install.initialize_options(self)
/home/buildbot/.venv/lib/python3.10/site-packages/setuptools/_distutils/cmd.py:66: SetuptoolsDeprecationWarning: setup.py install is deprecated.
!!

        ********************************************************************************
        Please avoid running ``setup.py`` directly.
        Instead, use pypa/build, pypa/installer or other
        standards-based tools.

        See https://blog.ganssle.io/articles/2021/10/setup-py-deprecated.html for details.
        ********************************************************************************

common/validate.sh

@@ -145,11 +145,11 @@ git log "$REVRANGE" --pretty=oneline || exit 1
 if ! $quick && ! $no_js; then
     for module in www/react-base www/react-console_view www/react-grid_view www/react-waterfall_view www/badges;
     do
-        status "running 'setup.py develop' for $module"
-        if ! (cd $module; python setup.py develop >/dev/null ); then
-            warning "$module/setup.py failed; retrying with cleared build/ dist/"
+        status "running 'pip install -e' for $module"
+        if ! (cd $module; pip install -e . >/dev/null ); then
+            warning "pip install -e for $module failed; retrying with cleared build/ dist/"
             rm -rf "$module/build" "$module/dist"
-            (cd $module; python setup.py develop >/dev/null ) || not_ok "$module/setup.py failed"
+            (cd $module; pip install -e . >/dev/null ) || not_ok "$module/setup.py failed"
         fi
     done
 else