Migrate scenes to new elevation

[manuq]

Follow up of #1613

Once the task above is done we'll need to manually migrate all scenes using tiles/elevation.tres/ to the new tiles/elevation_2.tres and maybe also add decorations (mines) on top.

The list of scenes referencing the tileset to replace is (git grep -l dfp36ffpanjq2):

• scenes/game_elements/characters/components/gym_area_test.tscn
• scenes/game_elements/characters/enemies/mothsache/Mothsache_test_scene.tscn
• scenes/game_elements/props/area_filler/components/area_filler_test.tscn
• scenes/game_elements/props/void/components/void_chromakey_test.tscn
• scenes/quests/lore_quests/quest_001/1_music_puzzle/music_puzzle.tscn
• scenes/quests/lore_quests/quest_001/2_ink_combat/ink_combat_round_1.tscn
• scenes/quests/lore_quests/quest_001/2_ink_combat/ink_combat_round_2.tscn
• scenes/quests/lore_quests/quest_001/2_ink_combat/ink_combat_round_3.tscn
• scenes/quests/lore_quests/quest_001/3_stealth_level/stealth_level.tscn
• scenes/quests/lore_quests/quest_002/1_void_runner/void_runner.tscn
• scenes/quests/lore_quests/quest_002/2_grappling_hook/grappling_hook_needles.tscn
• scenes/quests/lore_quests/quest_002/2_grappling_hook/grappling_hook_powerup.tscn
• scenes/quests/lore_quests/quest_003/1_stealth_sequence_combo/stealth_sequence_combo.tscn
• scenes/quests/lore_quests/quest_003/2_ink_drinker_levels/ink_combat_round_4.tscn
• scenes/quests/lore_quests/quest_003/2_ink_drinker_levels/ink_combat_round_5.tscn
• scenes/quests/lore_quests/quest_003/2_ink_drinker_levels/ink_combat_round_6.tscn
• scenes/quests/story_quests/el_juguete_perdido/1_stealth/stealth.tscn
• scenes/quests/story_quests/el_juguete_perdido/2_combat/combat.tscn
• scenes/quests/story_quests/el_juguete_perdido/3_sequence_puzzle/sequence_puzzle.tscn
• scenes/quests/story_quests/stella/0_stella_intro/stella_intro.tscn
• scenes/quests/story_quests/stella/1_stella_stealth/stella_stealth.tscn
• scenes/quests/story_quests/stella/2_stella_combat/stella_combat.tscn
• scenes/quests/story_quests/stella/4_stella_outro/stella_outro.tscn
• scenes/quests/story_quests/verso/2_verso_stealth_sadness/verso_stealth.tscn

Then:

• Update https://github.com/endlessm/threadbare/wiki/TileMapLayers-and-TileSets when this task is complete.