[cli][client][error-utils][frameworks][fs-detectors][hydrogen][next][node-bridge][node][redwood][remix][routing-utils][static-config] update @types/node to v14 across repo (#8842)

### Related Issues

Updates @types/node to the latest version within the v14 major (based on `npm view @types/node`)

```
❯ npm view @types/node@'>=14.0.0 <15.0.0' version | tail -1
@types/node@14.18.33 '14.18.33'
```

This PR also fixes the various necessary type changes

### 📋 Checklist

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#### Tests

- [ ] The code changed/added as part of this PR has been covered with tests
- [ ] All tests pass locally with `yarn test-unit`

#### Code Review

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- [ ] Issue from task tracker has a link to this PR

packages/cli/src/util/dev/parse-query-string.ts

@@ -4,7 +4,7 @@
  * @param querystring - The querystring to parse, also known as the "search" string.
  */
 export function parseQueryString(
-  querystring?: string
+  querystring?: string | null
 ): Record<string, string[]> {
   const query: Record<string, string[]> = Object.create(null);
   if (!querystring || !querystring.startsWith('?') || querystring === '?') {
@@ -38,9 +38,9 @@ export function parseQueryString(
  */
 export function formatQueryString(
   query: Record<string, string[]> | undefined
-): string | undefined {
+): string | null {
   if (!query) {
-    return undefined;
+    return null;
   }
   let s = '';
   let prefix = '?';
@@ -55,5 +55,5 @@ export function formatQueryString(
       prefix = '&';
     }
   }
-  return s || undefined;
+  return s || null;
 }