Proper i18n date/time handling (#17858)

* install date-fns-tz

* add date locale hook

* refactor formatUnixTimestampToDateTime

Use date-fns style instead of using strftime. This requires changing the i18n keys to the way date-fns represents dates (eg: "MMM d, h:mm:ss aaa"  instead of "%b %-d, %H:%M"

* refactor calendar to use new hook

* fix useFormattedTimestamp to use new formatUnixTimestampToDateTime date_format

* change i18n keys to new format

* fix timeline

* fix review

* fix explore

* fix metrics

* fix notifications

* fix face library

* clean up

web/public/locales/en/common.json

@@ -41,22 +41,34 @@
     "second_one": "{{time}} second",
     "second_other": "{{time}} seconds",
     "formattedTimestamp": {
-      "12hour": "%b %-d, %I:%M:%S %p",
-      "24hour": "%b %-d, %H:%M:%S"
+      "12hour": "MMM d, h:mm:ss aaa",
+      "24hour": "MMM d, HH:mm:ss"
     },
     "formattedTimestamp2": {
-      "12hour": "%m/%d %I:%M:%S%P",
-      "24hour": "%d %b %H:%M:%S"
+      "12hour": "MM/dd h:mm:ssa",
+      "24hour": "d MMM HH:mm:ss"
     },
-    "formattedTimestampExcludeSeconds": {
-      "12hour": "%b %-d, %I:%M %p",
-      "24hour": "%b %-d, %H:%M"
+    "formattedTimestampHourMinute": {
+      "12hour": "h:mm aaa",
+      "24hour": "HH:mm"
     },
-    "formattedTimestampWithYear": {
-      "12hour": "%b %-d %Y, %I:%M %p",
-      "24hour": "%b %-d %Y, %H:%M"
+    "formattedTimestampHourMinuteSecond": {
+      "12hour": "h:mm:ss aaa",
+      "24hour": "HH:mm:ss"
     },
-    "formattedTimestampOnlyMonthAndDay": "%b %-d"
+    "formattedTimestampMonthDayHourMinute": {
+      "12hour": "MMM d, h:mm aaa",
+      "24hour": "MMM d, HH:mm"
+    },
+    "formattedTimestampMonthDayYearHourMinute": {
+      "12hour": "MMM d yyyy, h:mm aaa",
+      "24hour": "MMM d yyyy, HH:mm"
+    },
+    "formattedTimestampMonthDay": "MMM d",
+    "formattedTimestampFilename": {
+      "12hour": "MM-dd-yy-h-mm-ss-a",
+      "24hour": "MM-dd-yy-HH-mm-ss"
+    }
   },
   "unit": {
     "speed": {