Update pycarwings2.py w.r.t. URL and encryption

[mekrapp]

Update pycarwings2 w.r.t. new URL of NISSAN API and method of encryption

NISSAN has changed the URL of its API as well as the method of encryption from Blowfish to AES.
Details see remuslazar/homeassistant-carwings#100
New API is at URL https://gdcportalgw.its-mo.com/api_v250205_NE/gdc/

Many thanks to @remuslazar and @zwartevogel who already updated pycarwings3.
see ev-freaks/pycarwings3#14
and remuslazar/homeassistant-carwings#101

With this PR the changes in pycarwings3 have been transferred to pycarwings2 for openWB V1.9.304.
In addition the function _PKCS5Padding(), which is using the encryption method Blowfish, is now obsolete and thus has been removed as well.
I already checked the new version of pycarwings2. It is running well with my NISSAN Leaf MY2018.

[mekrapp]

Hallo @benderl
anscheinend läuft der build nicht durch. Gibt es iwo ein Fehlerprotokoll?

[mekrapp]

Vermutlich liegt hier der Hund begraben. Der Workflow will mit Ubuntu 20.04 laufen:

name: Python application
on: pull_request
jobs:
build:
runs-on: ubuntu-20.04
...

Ubuntu 20.04 wird aber nicht mehr unterstützt:
"The Ubuntu 20.04 Actions runner image will begin deprecation on 2025-02-01 and will be fully unsupported by 2025-04-15 #11101"

Dann muss der Testlauf wohl erst auf ein jüngeres Ubuntu umgestellt werden.