feat(script): Extend the functionality of team generic scripts

[Mauller]

Closes: #1468

This PR fixes and extends the functionality of Team generic scripts.

Team generic scripts are evaluated within their own update function on the team instead of within the script engine. This allows the handling of the "This Team" behaviour to be evalutated properly.

Originally Team generic scripts would ignore many script properties and had limited functionality compared to normal scripts that execute within the script engine. They were also shared between all instances of a team as the scripts existed on the team prototype.

This PR enables the following functionality for Team generic scripts;

• Adhere to difficulty settings
• Seconds based timings now work
• Can be enabled and disabled through scripting
• One-Shot scripts can be enabled again for another run
• Individual Team instances have their own copies of scripts

The extended functionality is currently hidden behind a conditional to make sure the retail behaviour is currently maintained.
This was done to prevent mismatching when TSH clients play with retail clients, so a mismatch is prevented when a map has properties enabled that would have been ignored by retail.

---

• Let some mappers in the community try out the non retail changes
• Replicate in generals

[Mauller]

seems to be some mismatching that i was not expecting

[Mauller]

All good, i gated the changes behind a new compilation conditional and refactored the orignal coded a little to make it easier to read when compared to the new code.

[Mauller]

Just a small tweak so the non retail code could be built in VC6 too