LibWeb: Scale font size by 1.15 for line-height: normal

Browsers such as Chrome and Firefox apply an arbitrary scale to the
current font size if `normal` is used for `line-height`. Firefox uses
1.2 while Chrome uses 1.15. Let's go with the latter for now, it's
relatively easy to change if we ever want to go back on that decision.

This also requires updating the expectations for a lot of layout tests.
The upside of this is that it's a bit easier to compare our layout
results to other browsers', especially Chrome.

Tests/LibWeb/Text/expected/HTML/HTMLElement-offsetFoo-for-split-inline-element.txt

@@ -1,4 +1,4 @@
 b.offsetTop: 8
 b.offsetLeft: 8
 b.offsetWidth: 784
-b.offsetHeight: 51
+b.offsetHeight: 54

Tests/LibWeb/Text/expected/HTML/dimension-attributes.txt

@@ -52,9 +52,9 @@ Test embed.vspace = "120." maps to marginBottom: 120px
 Test embed.width = "100" maps to width: 0px
 Test embed.width = " 00110 " maps to width: 0px
 Test embed.width = "120." maps to width: 0px
-Test embed.height = "100" maps to height: 17px
-Test embed.height = " 00110 " maps to height: 17px
-Test embed.height = "120." maps to height: 17px
+Test embed.height = "100" maps to height: 18px
+Test embed.height = " 00110 " maps to height: 18px
+Test embed.height = "120." maps to height: 18px
 Test tr.height = "100" maps to height: 100px
 Test tr.height = " 00110 " maps to height: 110px
 Test tr.height = "120." maps to height: 120px

Tests/LibWeb/Text/expected/css/getComputedStyle-print-all.txt

@@ -84,7 +84,7 @@ background-position-x: 0%
 background-position-y: 0%
 background-repeat: repeat
 background-size: auto auto
-block-size: 1204px
+block-size: 1290px
 border-block-end-color: rgb(0, 0, 0)
 border-block-end-style: none
 border-block-end-width: medium
@@ -149,7 +149,7 @@ grid-row-start: auto
 grid-template-areas: none
 grid-template-columns: none
 grid-template-rows: none
-height: 2114px
+height: 2265px
 inline-size: 784px
 inset-block-end: auto
 inset-block-start: auto

Tests/LibWeb/Text/expected/element-get-bounding-client-rect-of-sticky.txt

@@ -1 +1 @@
-Bounding Client Rect: top=50, left=10, width=500, height=57
+Bounding Client Rect: top=50, left=10, width=500, height=58

Tests/LibWeb/Text/expected/element-get-client-rects.txt

@@ -1,2 +1,2 @@
 {"0":{"x":8,"y":500,"width":784,"height":150,"top":500,"right":792,"bottom":650,"left":8}}
-{"0":{"x":8,"y":650,"width":41.296875,"height":17,"top":650,"right":49.296875,"bottom":667,"left":8}}
+{"0":{"x":8,"y":650,"width":41.296875,"height":18,"top":650,"right":49.296875,"bottom":668,"left":8}}

Tests/LibWeb/Text/expected/get-bounding-client-rect.txt

@@ -1,2 +1,2 @@
 {"x":8,"y":500,"width":784,"height":150,"top":500,"right":792,"bottom":650,"left":8}
-{"x":8,"y":650,"width":41.296875,"height":17,"top":650,"right":49.296875,"bottom":667,"left":8}
+{"x":8,"y":650,"width":41.296875,"height":18,"top":650,"right":49.296875,"bottom":668,"left":8}

Tests/LibWeb/Text/expected/scroll-to-fragment.txt

@@ -1 +1 @@
-The page has been scrolled to y: 563
+The page has been scrolled to y: 565

Tests/LibWeb/Text/expected/scrollable-viewport-with-position-fixed.txt

@@ -1 +1 @@
-{"x":8,"y":8,"width":784,"height":17,"top":8,"right":792,"bottom":25,"left":8}
+{"x":8,"y":8,"width":784,"height":18,"top":8,"right":792,"bottom":26,"left":8}