MeterpreterOptions break-up and default extension loading removal

[dledda-r7]

This PR is related to #19975
In order to reduce the memory footprint of Meterpreter on target system is necessary to be sure only necessary code is loaded inside Meterpreter.

While working on standard api split, I noticed the presence of two extensions that were loaded without the user knowladge, priv and unhook.
This PR modifies the loading logic to use a datastore option AutoLoadExtension which contains a ';' separated list of extensions to load. At the moment inside lib/msf/base/sessions/meterpreter.rb is present a code block (commented) that keep the compability of the current working logic of Meterpreter.

Since the AutoLoadExtension logic depends on the platform, the break-up of meterpreter_option.rb to platform-specific option was necessary.

Tasks:

• meterpreter_options/common.rb
• meterpreter_options/linux.rb
• meterpreter_options/windows.rb
• meterpreter_options/android.rb
• meterpreter_options/osx.rb
• meterpreter_options/python.rb
• meterpreter_options/php.rb
• meterpreter_options/java.rb
• meterpreter_options/apple_ios.rb
• meterpreter_options/bsd.rb
• Remove meterpreter_options.rb

[dledda-r7]

Also blocked by #19799
because need of modify: tools/modules/meterpreter_reverse.erb

To future me: modify it to have the architecutre specific MeterpreterOptions

Let's resolve the conflicts once one of them is landed.

[adfoster-r7]

Maybe we can keep this around in MSF 7 still; maybe we could just change the default behaviors in the upcoming malleable profile config file setup that we're wanting to ship so that these aren't loaded by default, and they need to be opt-in. That way we're being less detected by default, rather than fighting against these older default values

[dledda-r7]

Thanks @msutovsky-r7
Good catch!

[msutovsky-r7]

Release Notes

This introduces a change in Meterpreter options and adds more control over Meterpreter extension to user. The change adds new datastore option AutoLoadExtension, which contains a list of Meterpreter extensions to be loaded automatically in Meterpreter, separated with comma - e.g. stdapi,priv.