ci(actions): make estimate labels clearable in Monday (#14622)

**Related Issue:** #14621

## Summary

Adds the `clearable: true` prop to each design/dev estimate label map,
allowing them to be cleared in Monday.com when they are removed from an
issue.

Author: isaacbraun

.github/scripts/support/monday.js

@@ -395,83 +395,95 @@ module.exports = function Monday(issue, core, updateIssueBody) {
       {
         column: mondayColumns.devEstimate,
         value: 1,
+        clearable: true,
       },
     ],
     [
       devEstimate.two,
       {
         column: mondayColumns.devEstimate,
         value: 2,
+        clearable: true,
       },
     ],
     [
       devEstimate.three,
       {
         column: mondayColumns.devEstimate,
         value: 3,
+        clearable: true,
       },
     ],
     [
       devEstimate.five,
       {
         column: mondayColumns.devEstimate,
         value: 5,
+        clearable: true,
       },
     ],
     [
       devEstimate.eight,
       {
         column: mondayColumns.devEstimate,
         value: 8,
+        clearable: true,
       },
     ],
     [
       devEstimate.thirteen,
       {
         column: mondayColumns.devEstimate,
         value: 13,
+        clearable: true,
       },
     ],
     [
       devEstimate.twentyOne,
       {
         column: mondayColumns.devEstimate,
         value: 21,
+        clearable: true,
       },
     ],
     [
       devEstimate.thirtyFour,
       {
         column: mondayColumns.devEstimate,
         value: 34,
+        clearable: true,
       },
     ],
     [
       designEstimate.two,
       {
         column: mondayColumns.designEstimate,
         value: 2,
+        clearable: true,
       },
     ],
     [
       designEstimate.five,
       {
         column: mondayColumns.designEstimate,
         value: 5,
+        clearable: true,
       },
     ],
     [
       designEstimate.thirteen,
       {
         column: mondayColumns.designEstimate,
         value: 13,
+        clearable: true,
       },
     ],
     [
       designEstimate.twentyOne,
       {
         column: mondayColumns.designEstimate,
         value: 21,
+        clearable: true,
       },
     ],
     [