Fix DOMPurify sanitize TypeError in Library components

Vue 2's initMethods calls .bind(vm) on every method, which creates a new
function that loses custom properties. The DOMPurify default export is a
callable function with .sanitize() as a property, so binding it strips
sanitize entirely, causing "TypeError: e.purify.sanitize is not a function"
at runtime.

Move purify out of methods/data and into setup() which returns values to
the template without binding. Also fix an import ordering lint issue in
DataTables.vue.

Fixes #22239

client/src/components/Libraries/LibraryEditField.vue

@@ -60,13 +60,15 @@ export default {
             type: Boolean,
         },
     },
+    setup() {
+        return { purify };
+    },
     data() {
         return {
             maxDescriptionLength: MAX_DESCRIPTION_LENGTH,
         };
     },
     methods: {
-        purify,
         updateValue(value) {
             this.$emit("update:changedValue", value);
         },

client/src/components/Libraries/LibraryFolder/LibraryFolder.vue

@@ -330,6 +330,9 @@ export default {
             required: false,
         },
     },
+    setup() {
+        return { purify };
+    },
     data() {
         return {
             ...initialFolderState(),
@@ -349,8 +352,6 @@ export default {
                 faTimes,
                 faUnlock,
                 faUsers,
-                // Utilities
-                purify,
                 // Data
                 currentPage: 1,
                 sortBy: "name",
@@ -396,7 +397,6 @@ export default {
         this.getFolder(this.folder_id, this.page);
     },
     methods: {
-        purify,
         getFolder(folder_id, page) {
             this.currentFolderId = folder_id;
             this.currentPage = page;