fix(date picker): detect change range interval console error (#11532)

### Related Ticket(s)

Closes #11490

### Description

In Date picker element, dev tool console shows error `Uncaught TypeError: fp.getDateStr is not a function`.

### Changelog

**Removed**

- Removed custom event handling function.

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Author: sangeethababu9223

.yarn/cache/flatpickr-npm-4.6.13-06399933fc-0e32f2fbd4.zip

@@ -74,7 +74,7 @@
     "@carbon/styles": "1.51.0",
     "@floating-ui/dom": "^1.6.3",
     "@ibm/telemetry-js": "^1.2.1",
-    "flatpickr": "4.6.1",
+    "flatpickr": "4.6.13",
     "lit": "^2.7.6",
     "lodash-es": "^4.17.21"
   },

.yarn/cache/flatpickr-patch-9090094964-720e102d03.zip

@@ -105,7 +105,6 @@ export default (config: Config): Plugin => {
           fp._hBXCEDatePickerRangePluginOnBlurTo.release();
       }
     };
-
     return Object.assign(origRangePlugin, {
       onReady() {
         origOnReady.call(this);

packages/carbon-web-components/package.json

@@ -3737,7 +3737,7 @@ __metadata:
     expect-playwright: "npm:~0.8.0"
     expect-puppeteer: "npm:^6.0.0"
     file-loader: "npm:^6.2.0"
-    flatpickr: "npm:4.6.1"
+    flatpickr: "npm:4.6.13"
     fs-extra: "npm:^10.0.0"
     gulp: "npm:^4.0.2"
     gulp-babel: "npm:^8.0.0"
@@ -17427,13 +17427,27 @@ __metadata:
   languageName: node
   linkType: hard
 
+"flatpickr@npm:4.6.13":
+  version: 4.6.13
+  resolution: "flatpickr@npm:4.6.13"
+  checksum: 10/0e32f2fbd427aa8d838da8fb0cf2e56b65efc22783dcebcc32c11b7fbb6bbc8c3532f9410915f3acb7dc0feebb49202bea03e49cc80b9d4d11b3bdce49488bc0
+  languageName: node
+  linkType: hard
+
 "flatpickr@npm:4.6.9":
   version: 4.6.9
   resolution: "flatpickr@npm:4.6.9"
   checksum: 10/0845ef213be9aa48df3c0983e9cea7043e8678eba931d382994e5e8aa07ae2c6d3fead7570d4dcac8e063b53bc489053b9842cd2a771868a280880dfca487a5e
   languageName: node
   linkType: hard
 
+"flatpickr@patch:flatpickr@npm%3A4.6.13#./.yarn/patches/flatpickr-npm-4.6.13-06399933fc.patch::locator=carbon-for-ibm-dotcom%40workspace%3A.":
+  version: 4.6.13
+  resolution: "flatpickr@patch:flatpickr@npm%3A4.6.13#./.yarn/patches/flatpickr-npm-4.6.13-06399933fc.patch::version=4.6.13&hash=45a0af&locator=carbon-for-ibm-dotcom%40workspace%3A."
+  checksum: 10/720e102d03aa2ac3a4ad4778acdae55c90f49345293621b33a18dce23cb40cc9880853a694b8d92de7cecd7699c447a5609318bf41e25606465321c83840a582
+  languageName: node
+  linkType: hard
+
 "flatted@npm:^3.2.7, flatted@npm:^3.2.9":
   version: 3.2.9
   resolution: "flatted@npm:3.2.9"