update render test cases

test/ignores.json

@@ -13,12 +13,7 @@
   "render-tests/mixed-zoom/z10-z11": "current behavior conflicts with https://github.com/mapbox/mapbox-gl-js/pull/6803. can be fixed when https://github.com/mapbox/api-maps/issues/1480 is done",
   "render-tests/fill-extrusion-pattern/tile-buffer": "https://github.com/mapbox/mapbox-gl-js/issues/4403",
   "render-tests/symbol-sort-key/text-ignore-placement": "skip - text drawn over icons",
-  "render-tests/icon-text-fit/both-collision-variable-anchor-text-fit": "https://github.com/mapbox/mapbox-gl-js/issues/8583",
-  "render-tests/icon-text-fit/both-collision-variable-anchor": "https://github.com/mapbox/mapbox-gl-js/issues/8583",
-  "render-tests/icon-text-fit/both-collision": "https://github.com/mapbox/mapbox-gl-js/issues/8583",
-  "render-tests/regressions/mapbox-gl-js#5631": "https://github.com/mapbox/mapbox-gl-js/issues/8583",
-  "render-tests/text-variable-anchor/all-anchors-icon-text-fit": "https://github.com/mapbox/mapbox-gl-js/issues/8583",
-  "render-tests/text-variable-anchor/icon-text-fit-collision-box": "https://github.com/mapbox/mapbox-gl-js/issues/8583",
+  "render-tests/text-variable-anchor/remember-last-placement": "skip - not sure this is correct behavior",
   "render-tests/text-writing-mode/point_label/cjk-variable-anchors-vertical-horizontal-mode-icon-text-fit": "https://github.com/mapbox/mapbox-gl-js/issues/8583",
   "render-tests/text-writing-mode/point_label/mixed-multiline-vertical-horizontal-mode-icon-text-fit": "https://github.com/mapbox/mapbox-gl-js/issues/8583",
   "render-tests/icon-image/icon-sdf-non-sdf-one-layer": "skip - render sdf icon and normal icon in one layer"

test/integration/render-tests/text-variable-anchor/icon-text-fit-collision-box/style.json

@@ -4,6 +4,7 @@
     "test": {
       "height": 128,
       "width": 128,
+      "allowed": 0.0075,
       "collisionDebug": true
     }
   },