Merge branch 'feature/py23_kconfig_new' into 'master'

tools: Make kconfig_new Python3-compatible and enable Python3 in idf.py

See merge request idf/esp-idf!3304

diff --cc .gitlab-ci.yml
Simple merge

diff --cc tools/kconfig_new/gen_kconfig_doc.py
index d16be858f4e83f2414500efd2a47ca83e7bcefae,b43106ff31acbf4ae9ffa95df07a2a84ff10804d..af73c886d4805ba6a1cec5516a7ff48847792354
--- 1/tools/kconfig_new/gen_kconfig_doc.py
--- 2/tools/kconfig_new/gen_kconfig_doc.py
+++ b/tools/kconfig_new/gen_kconfig_doc.py
@@@ -20,8 -20,8 +20,9 @@@
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
+ from __future__ import print_function
  import os
 +import re
  import kconfiglib
  
  # Indentation to be used in the generated file