Fix EndingRound event

[BoltonDev]

Description

Describe the changes

• Replace base game logic with LeadingTeam leadingTeam = ev.LeadingTeam
  • This fix getter & setter of ev.LeadingTeam
• Remove IsRoundEnded (IsAllowed do the same)

What is the current behavior? (You can also link to an open issue here)

• ev.LeadingTeam always return FacilityForces (represents 0)
• ev.LeadingTeam setter doesn't work
• unneeded property in the event

What is the new behavior? (if this is a feature change)

• ev.LeadingTeam return the correct LeadingTeam
• set ev.LeadingTeam change the team that win the round
• IsRoundEnded is now IsAllowed

Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

Other information:

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentations

Submission checklist

• I have checked the project can be compiled
• I have tested my changes and it worked as expected

Patches (if there are any changes related to Harmony patches)

• I have checked no IL patching errors in the console

Other

• Still requires more testing