Fix input validation patterns for resource ids (#2086)

* Fix input element pattern matching and add validation reporting for
cases where the element is not within a form element.

* Update test snapshots.

* Remove old code and fix trigger error message.

* Move id validation to a util class.

* Add unit tests, fix standalone function, rename constants.

src/Explorer/Panes/AddDatabasePanel/AddDatabasePanel.tsx

@@ -1,5 +1,6 @@
 import { Checkbox, Stack, Text, TextField } from "@fluentui/react";
 import { getNewDatabaseSharedThroughputDefault } from "Common/DatabaseUtility";
+import { ValidCosmosDbIdDescription, ValidCosmosDbIdInputPattern } from "Utils/ValidationUtils";
 import React, { FunctionComponent, useEffect, useState } from "react";
 import * as Constants from "../../../Common/Constants";
 import { getErrorMessage, getErrorStack } from "../../../Common/ErrorHandlingUtils";
@@ -204,8 +205,8 @@ export const AddDatabasePanel: FunctionComponent<AddDatabasePaneProps> = ({
             type="text"
             aria-required="true"
             autoComplete="off"
-            pattern="[^/?#\\]*[^/?# \\]"
-            title="May not end with space nor contain characters '\' '/' '#' '?'"
+            pattern={ValidCosmosDbIdInputPattern.source}
+            title={ValidCosmosDbIdDescription}
             size={40}
             aria-label={databaseIdLabel}
             placeholder={databaseIdPlaceHolder}