refactor(icon): gripper icon fallback size

The gripper icon classes used previously were wrong in several ways.
For one, they were using '100' size naming in the classes which are not
currently used or displayed. These icons are without the number size.
The alias values being applied to them also appear to be incorrect when
looking at the widths, and the CSS was swapping width for height.

That there is no size applied to these icons was obfuscated by the fact
that the attribute width="10" is being applied to icons in Storybook.

Added a fallback to the default 100 workflow sizing; SWC is also
currently showing these icons with workflow sizing. Currently these
gripper icons do not have size tokens defined yet, but they may be added
in the future "as they are needed"; when these icons start being used.

Author: jawinn

components/icon/ui-icons.css

@@ -396,22 +396,22 @@ governing permissions and limitations under the License.
   --spectrum-icon-size: var(--spectrum-cross-icon-size-600);
 }
 
+/* Note: Gripper icons currently do not having number sizing or size
+   tokens, so are using the workflow icon size as a fallback. */
+
 /* Triple Gripper */
-.spectrum-UIIcon-TripleGripper100 {
-  inline-size: var(--spectrum-alias-ui-icon-triplegripper-size-100-height);
-  block-size: var(--spectrum-alias-ui-icon-triplegripper-size-100-width);
+.spectrum-UIIcon-TripleGripper {
+  --spectrum-icon-size: var(--spectrum-workflow-icon-size-100);
 }
 
 /* Double Gripper */
-.spectrum-UIIcon-DoubleGripper100 {
-  inline-size: var(--spectrum-alias-ui-icon-doublegripper-size-100-height);
-  block-size: var(--spectrum-alias-ui-icon-doublegripper-size-100-width);
+.spectrum-UIIcon-DoubleGripper {
+  --spectrum-icon-size: var(--spectrum-workflow-icon-size-100);
 }
 
 /* Single Gripper */
-.spectrum-UIIcon-SingleGripper100 {
-  inline-size: var(--spectrum-alias-ui-icon-singlegripper-size-100-height);
-  block-size: var(--spectrum-alias-ui-icon-singlegripper-size-100-width);
+.spectrum-UIIcon-SingleGripper {
+  --spectrum-icon-size: var(--spectrum-workflow-icon-size-100);
 }
 
 /* Corner Triangle */