python.mod venv support

[thommey]

Found by: simple
Patch by: thommey

Default Python (no venv):

sys.base_exec_prefix='/usr'
sys._base_executable='/usr/bin/python3'
sys.base_prefix='/usr'
sys.exec_prefix='/usr'
sys.executable='/usr/bin/python3'
sys.prefix='/usr'
sys.path =['/home/bot/eggdrop', '/usr/lib/python311.zip', '/usr/lib/python3.11', '/usr/lib/python3.11/lib-dynload', '/usr/local/lib/python3.11/dist-packages', '/usr/lib/python3/dist-packages']

Python with venv:

sys.base_exec_prefix='/usr'
sys._base_executable='/usr/bin/python3.11'
sys.base_prefix='/usr'
sys.exec_prefix='/home/bot/eggdrop/venv'
sys.executable='/home/bot/eggdrop/venv/bin/python3'
sys.prefix='/home/bot/eggdrop/venv'
sys.path =['/home/bot/eggdrop', '/usr/lib/python311.zip', '/usr/lib/python3.11', '/usr/lib/python3.11/lib-dynload', '/home/bot/eggdrop/venv/lib/python3.11/site-packages']

Eggdrop before this PR:

Module loaded: python
sys.base_exec_prefix='/usr'
sys._base_executable=''
sys.base_prefix='/usr'
sys.exec_prefix='/usr'
sys.executable=''
sys.prefix='/usr'
sys.path =['/usr/lib/python311.zip', '/usr/lib/python3.11', '/usr/lib/python3.11/lib-dynload', '/usr/local/lib/python3.11/dist-packages', '/usr/lib/python3/dist-packages', '.']

Eggdrop after this PR:

Module loaded: python
sys.base_exec_prefix='/usr'
sys._base_executable='/usr/bin/python3.11'
sys.base_prefix='/usr'
sys.exec_prefix='/home/bot/eggdrop/venv'
sys.executable='/home/bot/eggdrop/venv/bin/python'
sys.prefix='/home/bot/eggdrop/venv'
sys.path =['/usr/lib/python311.zip', '/usr/lib/python3.11', '/usr/lib/python3.11/lib-dynload', '/home/bot/eggdrop/venv/lib/python3.11/site-packages', '.']