allow variants for extension name in metadata.ini

[light-and-ray]

Description

Allow require one of few extensions in metadata.ini. E.g.

# This section contains information about the extension itself.
# This section is optional.
[Extension]

# A canonical name of the extension. 
# Only lowercase letters, numbers, dashes and underscores are allowed. 
# This is a unique identifier of the extension, and the loader will refuse to 
# load two extensions with the same name. If the name is not supplied, the 
# name of the extension directory is used. Other extensions can use this 
# name to refer to this extension in the file.
Name = sd-webui-cn-in-extras-tab

# A comma-or-space-separated list of extensions that this extension requires 
# to be installed and enabled.
# The loader will generate a warning if any of the extensions in this list is
# not installed or disabled.
Requires = sd-webui-controlnet | sd_forge_controlnet

Checklist:

• I have read contributing wiki page
• I have performed a self-review of my own code
• My code follows the style guidelines
• My code passes tests