resprites plastic & dirty steel tiles to match new floortile style (#18643)

Resources/Textures/Tiles/attributions.yml

@@ -26,16 +26,11 @@
   copyright: "Created by github user @notquitehadouken."
   source: "https://github.com/space-wizards/space-station-14/pull/17948"
 
-- files: [ "bar.png", "blue.png", "kitchen.png", "laundry.png", "mime.png", "steel.png", "steel_dirty.png", "steel_diagonal.png", "steel_mini.png", "steel_offset.png", "steel_pavement.png", "white.png", "white_diagonal.png", "white_mini.png", "white_offset.png", "white_pavement.png", "dark.png", "dark_diagonal.png", "dark_mini.png", "dark_offset.png", "dark_pavement.png", "hydro.png", "clown.png" ]
+- files: [ "bar.png", "blue.png", "kitchen.png", "laundry.png", "mime.png", "steel.png", "steel_dirty.png", "steel_diagonal.png", "steel_mini.png", "steel_offset.png", "steel_pavement.png", "white.png", "white_diagonal.png", "white_mini.png", "white_offset.png", "white_pavement.png", "dark.png", "dark_diagonal.png", "dark_mini.png", "dark_offset.png", "dark_pavement.png", "hydro.png", "plastic.png", "dark_plastic.png", "white_plastic.png", "clown.png" ]
   license: "CC-BY-SA-3.0"
   copyright: "Created by github user @Flareguy, original, unedited base tiles modified from /tg/station at commit 6665eec76c98a4f3f89bebcd10b34b47dcc0b8ae and github user @moonheart08"
   source: "https://github.com/space-wizards/space-station-14/"
 
-- files: ["dark_plastic.png", "white_plastic.png"]
-  license: "CC0-1.0"
-  copyright: "Created by github user @moonheart8"
-  source: "https://github.com/space-wizards/space-station-14/pull/12140"
-
 - files: ["arcadeblue.png", "arcadered.png"]
   license: "CC-BY-SA-3.0"
   copyright: "arcadered renamed from eightiesred, arcadeblue by Peptide90 modified from arcadered.png, tgstation commit 8abb19545828230d92ba18827feeb42a67a55d49"