Bug 1541651 [wpt PR 16137] - These tests should use Ahem font, a=testonly

Automatic update from web-platform-tests
Use Ahem for these tests. (#16137)

Safari renders incorrectly these cases due to a bug (https://webkit.org/b/196169) when using monospace font.
--

wpt-commits: 3ad4a3b1dfbb5199cb6e60ef5981a63afc5c438d
wpt-pr: 16137

testing/web-platform/tests/css/css-text/white-space/reference/white-space-intrinsic-size-001-ref.html

@@ -4,7 +4,7 @@
 <link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net/">
 <style>
 div {
-  font-family: monospace;
+  font-family: Ahem;
   color: transparent;
   font-size: 50px;
   background: green;

testing/web-platform/tests/css/css-text/white-space/reference/white-space-intrinsic-size-002-ref.html

@@ -6,7 +6,7 @@
 div {
   color: transparent;
   background: blue;
-  font-family: monospace;
+  font-family: Ahem;
   font-size: 50px;
   width: 3ch;
 }

testing/web-platform/tests/css/css-text/white-space/reference/white-space-intrinsic-size-003-ref.html

@@ -4,6 +4,7 @@
 <link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net/">
 <style>
 div {
+  font-family: Ahem;
   color: transparent;
   font-size: 50px;
   background: green;

testing/web-platform/tests/css/css-text/white-space/reference/white-space-intrinsic-size-004-ref.html

@@ -9,7 +9,7 @@ aside {
 }
 div {
   color: transparent;
-  font-family: monospace;
+  font-family: Ahem;
   font-size: 50px;
   width: 5ch;
 }

testing/web-platform/tests/css/css-text/white-space/white-space-intrinsic-size-001.html

@@ -15,7 +15,7 @@ aside {
 }
 aside:last-of-type { overflow-wrap: break-word; }
 div {
-  font-family: monospace;
+  font-family: Ahem;
   color: transparent;
   font-size: 50px;
   width: 0ch;

testing/web-platform/tests/css/css-text/white-space/white-space-intrinsic-size-002.html

@@ -19,7 +19,7 @@ aside:last-of-type {
 }
 div {
   color: transparent;
-  font-family: monospace;
+  font-family: Ahem;
   font-size: 50px;
   width: 3ch;
   /* both floats should take the full 3ch,

testing/web-platform/tests/css/css-text/white-space/white-space-intrinsic-size-003.html

@@ -15,6 +15,7 @@ aside {
 }
 div {
   color: transparent;
+  font-family: Ahem;
   font-size: 50px;
   width: 0ch;
 }

testing/web-platform/tests/css/css-text/white-space/white-space-intrinsic-size-004.html

@@ -17,7 +17,7 @@ aside {
 aside:last-of-type { overflow-wrap: break-word; }
 div {
   color: transparent;
-  font-family: monospace;
+  font-family: Ahem;
   font-size: 50px;
   width: 3ch; /* enough room for both floats if their max-content size does not include the preserved spaces,
 		 but not enough if they do, causing a line break in that case. */