Fix "Better troop management for nations 🤖" (#4265)

## Description:

There was a check missing...
The troop management stuff should be disabled for team games because
nations can expect donations in that case, and its mainly relevant for
FFAs.

## Please complete the following:

- [X] I have added screenshots for all UI updates
- [X] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [X] I have added relevant tests to the test directory

## Please put your Discord username so you can be contacted if a bug or
regression is found:

FloPinguin

src/core/execution/utils/AiAttackBehavior.ts

@@ -851,12 +851,15 @@ export class AiAttackBehavior {
   }
 
   /**
-   * For Hard & Impossible nations: returns true if `troops` is less than 20%
-   * of the target's troop count, meaning the attack is too weak to be
-   * worthwhile.  Bots are exempt.
+   * For Hard & Impossible nations in FFA: returns true if `troops` is less
+   * than 20% of the target's troop count, meaning the attack is too weak to
+   * be worthwhile.  Bots and team games are exempt.
    */
   private isAttackTooWeak(troops: number, target: Player): boolean {
     if (this.player.type() === PlayerType.Bot) return false;
+    if (this.game.config().gameConfig().gameMode === GameMode.Team)
+      return false;
+
     const { difficulty } = this.game.config().gameConfig();
     return (
       (difficulty === Difficulty.Hard ||
@@ -866,14 +869,18 @@ export class AiAttackBehavior {
   }
 
   /**
-   * For Hard & Impossible nations: computes the max troops this nation can send
-   * in an attack without letting its troop count drop below a fraction of its
-   * strongest non-allied neighbor's troop count (Hard: 75%, Impossible: 90%).
-   * Allied players and bot neighbors are not considered threats.
-   * Bots are entirely exempt. Returns Infinity when no cap applies.
+   * For Hard & Impossible nations in FFA: computes the max troops this nation
+   * can send in an attack without letting its troop count drop below a
+   * fraction of its strongest non-allied neighbor's troop count (Hard: 75%,
+   * Impossible: 90%). Allied players and bot neighbors are not considered
+   * threats. Bots and team games are entirely exempt. Returns Infinity when
+   * no cap applies.
    */
   private troopSendCap(): number {
     if (this.player.type() === PlayerType.Bot) return Infinity;
+    if (this.game.config().gameConfig().gameMode === GameMode.Team)
+      return Infinity;
+
     const { difficulty } = this.game.config().gameConfig();
     let retainFraction: number;
     switch (difficulty) {