Trial spawners never try to spawn mobs in peaceful difficulty

When the difficulty is set to peaceful, trial spawners will never try to spawn mobs and will get stuck in the waiting_for_players state. This occurs even with passive mobs such as a pig, which is inconsistent with regular monster spawners.

There was a similar bug report about this MC-266556, however this wasn't properly fixed as now the trial spawner gets stuck in the waiting_for_players state and won't actually try to spawn mobs, instead of staying inactive

Steps to reproduce:

1. Set the difficulty to peaceful

2. Place a trial spawner in a grassy area

3. Right-click on the trial spawner with a pig spawn egg

4. Go into survival mode

5. Look at the trial spawner with the F3 screen enabled

6. Notice how the trial_spawner_state never changes from waiting_for_players

Expected result:

The trial spawner should go into the active state and spawn mobs which are passive.

Code analysis:

In net.minecraft.world.level.block.entity.trialspawner.TrialSpawnerState#tickAndGetNext, when the state is WAITING_FOR_PLAYERS the TrialSpawner#canSpawnInLevel method is called.

case 1 -> {
        if (!trialSpawner.canSpawnInLevel(serverLevel)) {
            trialSpawnerData.resetStatistics();
            yield this;
        }
        if (!trialSpawnerData.hasMobToSpawn(trialSpawner, serverLevel.random)) {
            yield INACTIVE;
        }
        trialSpawnerData.tryDetectPlayers(serverLevel, blockPos, trialSpawner);
        if (trialSpawnerData.detectedPlayers.isEmpty()) {
            yield this;
        }
        yield ACTIVE;
    }

The canSpawnInLevel method in net.minecraft.world.level.block.entity.trialspawner.TrialSpawner always returns false on peaceful difficulty and doesn't check if the mob is passive, resulting in the spawner never trying to spawn passive mobs

public boolean canSpawnInLevel(ServerLevel serverLevel) {
    if (this.overridePeacefulAndMobSpawnRule) {
        return true;
    }
    if (serverLevel.getDifficulty() == Difficulty.PEACEFUL) {
        return false;
    }
    return serverLevel.getGameRules().getBoolean(GameRules.RULE_DOMOBSPAWNING);
}