[Lens] Fixes color mappings special tockens i18n (#168152)

## Summary

fix https://github.com/elastic/kibana/issues/168151

To test:
- create a cartesian charts with breakdowns that contains both the
`Other` group and an `(empty)` value
- apply a manual color mapping that use both these terms by select them
from the combo-box, not by typing them.
- Then change the Kibana language to a different one other than English
and see if the color mapping applies correctly.

---------

Co-authored-by: Stratoula Kalafateli <efstratia.kalafateli@elastic.co>

packages/kbn-coloring/src/shared_components/color_mapping/color/rule_matching.ts

@@ -6,6 +6,7 @@
  * Side Public License, v 1.
  */
 
+import { i18n } from '@kbn/i18n';
 import { ColorMapping } from '../config';
 
 export function ruleMatch(
@@ -41,6 +42,16 @@ export function rangeMatch(rule: ColorMapping.RuleRange, value: number) {
 
 // TODO: move in some data/table related package
 export const SPECIAL_TOKENS_STRING_CONVERTION = new Map([
-  ['__other__', 'Other'],
-  ['', '(empty)'],
+  [
+    '__other__',
+    i18n.translate('coloring.colorMapping.terms.otherBucketLabel', {
+      defaultMessage: 'Other',
+    }),
+  ],
+  [
+    '',
+    i18n.translate('coloring.colorMapping.terms.emptyLabel', {
+      defaultMessage: '(empty)',
+    }),
+  ],
 ]);

x-pack/plugins/translations/translations/fr-FR.json

@@ -229,6 +229,8 @@
     "coloring.dynamicColoring.rangeType.label": "Type de valeur",
     "coloring.dynamicColoring.rangeType.number": "Numéro",
     "coloring.dynamicColoring.rangeType.percent": "Pourcent",
+    "coloring.colorMapping.terms.otherBucketLabel": "Autre",
+    "coloring.colorMapping.terms.emptyLabel": "(vide)",
     "console.helpPage.learnAboutConsoleAndQueryDslText": "En savoir plus sur {console} et {queryDsl}",
     "console.historyPage.itemOfRequestListAriaLabel": "Requête : {historyItem}",
     "console.settingsPage.refreshInterval.everyNMinutesTimeInterval": "Toutes les {value} {value, plural, one {minute} many {minutes} other {minutes}}",

x-pack/plugins/translations/translations/ja-JP.json

@@ -229,6 +229,8 @@
     "coloring.dynamicColoring.rangeType.label": "値型",
     "coloring.dynamicColoring.rangeType.number": "数字",
     "coloring.dynamicColoring.rangeType.percent": "割合（%）",
+    "coloring.colorMapping.terms.otherBucketLabel":"その他",
+    "coloring.colorMapping.terms.emptyLabel": "（空）",
     "console.helpPage.learnAboutConsoleAndQueryDslText": "{console}と{queryDsl}についてさらに詳しく",
     "console.historyPage.itemOfRequestListAriaLabel": "リクエスト：{historyItem}",
     "console.settingsPage.refreshInterval.everyNMinutesTimeInterval": "{value}{value, plural, other {分}}毎",

x-pack/plugins/translations/translations/zh-CN.json

@@ -229,6 +229,8 @@
     "coloring.dynamicColoring.rangeType.label": "值类型",
     "coloring.dynamicColoring.rangeType.number": "数字",
     "coloring.dynamicColoring.rangeType.percent": "百分比",
+    "coloring.colorMapping.terms.otherBucketLabel":"其他",
+    "coloring.colorMapping.terms.emptyLabel": "（空）",
     "console.helpPage.learnAboutConsoleAndQueryDslText": "了解 {console} 和 {queryDsl}",
     "console.historyPage.itemOfRequestListAriaLabel": "请求：{historyItem}",
     "console.settingsPage.refreshInterval.everyNMinutesTimeInterval": "每 {value} {value, plural, other {分钟}}",