bugfix: when nuking nearby water, the attacker was not marked as a traitor on launch (#1574)

## Description:

There was a bug where we only checked for betrayals if the target tile
was owned.

## 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
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I have read and accepted the CLA aggreement (only required once).

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

evan

src/core/configuration/DefaultConfig.ts

@@ -805,6 +805,10 @@ export class DefaultConfig implements Config {
     throw new Error(`Unknown nuke type: ${unitType}`);
   }
 
+  nukeAllianceBreakThreshold(): number {
+    return 100;
+  }
+
   defaultNukeSpeed(): number {
     return 6;
   }