python: drop support for 3.8

Python 3.8 had end-of-life on 2024-10-07, dropping support for it.

Change-Id: I96a4e765f8247f0e75d2ccef23f5c242dfd620fe

Author: ader1990

.github/workflows/cloudbase_init_tests.yml

@@ -36,7 +36,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        python-version: [ "3.8", "3.12"]
+        python-version: [ "3.9", "3.12"]
         architecture: ["x64", "x86"]
 
     steps:

setup.cfg

@@ -15,7 +15,6 @@ classifier =
   Operating System :: OS Independent
   Programming Language :: Python
   Programming Language :: Python :: 3
-  Programming Language :: Python :: 3.8
   Programming Language :: Python :: 3.9
   Programming Language :: Python :: 3.10
   Programming Language :: Python :: 3.11