Use parseBoolean for canEdit

In _sidebar.html.haml,
can_edit_issuable must be turned into a string
before used as data attribute

app/views/shared/issuable/_sidebar.html.haml

@@ -59,7 +59,7 @@
             = f.hidden_field 'milestone_id', value: milestone[:id], id: nil
             = dropdown_tag('Milestone', options: { title: _('Assign milestone'), toggle_class: 'js-milestone-select js-extra-options', filter: true, dropdown_class: 'dropdown-menu-selectable', placeholder: _('Search milestones'), data: { show_no: true, field_name: "#{issuable_type}[milestone_id]", project_id: issuable_sidebar[:project_id], issuable_id: issuable_sidebar[:id], ability_name: issuable_type, issue_update: issuable_sidebar[:issuable_json_path], use_id: true, default_no: true, selected: milestone[:title], null_default: true, display: 'static' }})
           - if @project.group.present? && issuable_sidebar[:supports_iterations]
-            = render_if_exists 'shared/issuable/iteration_select', can_edit: can_edit_issuable, group_path: @project.group.full_path, project_path: issuable_sidebar[:project_full_path], issue_iid: issuable_sidebar[:iid], issuable_type: issuable_type
+            = render_if_exists 'shared/issuable/iteration_select', can_edit: can_edit_issuable.to_s, group_path: @project.group.full_path, project_path: issuable_sidebar[:project_full_path], issue_iid: issuable_sidebar[:iid], issuable_type: issuable_type
 
       - if issuable_sidebar[:supports_time_tracking]
         #issuable-time-tracker.block

ee/app/assets/javascripts/sidebar/mount_sidebar.js

@@ -101,7 +101,7 @@ function mountIterationSelect() {
       createElement('iteration-select', {
         props: {
           groupPath,
-          canEdit,
+          canEdit: parseBoolean(canEdit),
           projectPath,
           issueIid,
         },

ee/changelogs/unreleased/use-parse-boolean-for-iteration-can-edit-value.yml

+---
+title: Fix invalid prop error for canEdit prop in issue sidebar when user cannot edit iteration
+merge_request: 53819
+author:
+type: fixed