Tests: Add clip-path to calc() coverage test

Tests/LibWeb/Text/expected/css/calc-coverage.txt

@@ -34,6 +34,10 @@ border-top-width: 'calc(2px)' -> 'calc(2px)'
 border-top-width: 'calc(2px * var(--n))' -> 'calc(2px * 2)'
 bottom: 'calc(2px)' -> 'calc(2px)'
 bottom: 'calc(2px * var(--n))' -> 'calc(2px * 2)'
+clip-path: 'polygon(calc(0px) calc(2px), calc(2px) calc(0px), calc(2px) calc(2px))' -> 'polygon(calc(0px) calc(2px),calc(2px) calc(0px),calc(2px) calc(2px))'
+clip-path: 'polygon(calc(0px * var(--n)) calc(2px * var(--n)), calc(2px * var(--n)) calc(0px * var(--n)), calc(2px * var(--n)) calc(2px * var(--n)))' -> 'polygon(calc(0px * 2) calc(2px * 2),calc(2px * 2) calc(0px * 2),calc(2px * 2) calc(2px * 2))'
+clip-path: 'polygon(calc(0%) calc(2%), calc(2%) calc(0%), calc(2%) calc(2%))' -> 'polygon(calc(0%) calc(2%),calc(2%) calc(0%),calc(2%) calc(2%))'
+clip-path: 'polygon(calc(0% * var(--n)) calc(2% * var(--n)), calc(2% * var(--n)) calc(0% * var(--n)), calc(2% * var(--n)) calc(2% * var(--n)))' -> 'polygon(calc(0% * 2) calc(2% * 2),calc(2% * 2) calc(0% * 2),calc(2% * 2) calc(2% * 2))'
 column-count: 'calc(2)' -> 'calc(2)'
 column-count: 'calc(2 * var(--n))' -> '4'
 column-gap: 'calc(2px)' -> 'calc(2px)'

Tests/LibWeb/Text/input/css/calc-coverage.html

@@ -80,6 +80,12 @@
             "calc(2px)",
             "calc(2px * var(--n))",
         ],
+        "clip-path": [
+            "polygon(calc(0px) calc(2px), calc(2px) calc(0px), calc(2px) calc(2px))",
+            "polygon(calc(0px * var(--n)) calc(2px * var(--n)), calc(2px * var(--n)) calc(0px * var(--n)), calc(2px * var(--n)) calc(2px * var(--n)))",
+            "polygon(calc(0%) calc(2%), calc(2%) calc(0%), calc(2%) calc(2%))",
+            "polygon(calc(0% * var(--n)) calc(2% * var(--n)), calc(2% * var(--n)) calc(0% * var(--n)), calc(2% * var(--n)) calc(2% * var(--n)))",
+        ],
         "column-count": [
             "calc(2)",
             "calc(2 * var(--n))",