Fix deprecation warning about fs.rmdirSync(path, { recursive: true }) (#1254)

Logs from running this action
([example](https://github.com/github/dependabot-action/actions/runs/9784790222/job/27016465395#step:3:155)):
```
(node:1631) [DEP0147] DeprecationWarning: In future versions of Node.js, fs.rmdir(path, { recursive: true }) will be removed. Use fs.rm(path, { recursive: true }) instead
(Use `node --trace-deprecation ...` to show where the warning was created)
```

Relevant docs: https://nodejs.org/api/fs.html#fsrmdirsyncpath-options

This deprecation landed in Node 16.

Author: jeffwidman

Diff for: __tests__/updater-builder-integration.test.ts

@@ -45,7 +45,7 @@ integration('UpdaterBuilder', () => {
 
   afterEach(async () => {
     await removeDanglingUpdaterContainers()
-    fs.rmdirSync(workingDirectory, {recursive: true})
+    fs.rmSync(workingDirectory, {recursive: true})
   })
 
   it('createUpdaterContainer returns a container only connected to the internal network', async () => {

Diff for: __tests__/updater-integration.test.ts

@@ -64,7 +64,7 @@ integration('Updater', () => {
   afterEach(async () => {
     server && server() // teardown server process
     await removeDanglingUpdaterContainers()
-    fs.rmdirSync(workingDirectory, {recursive: true})
+    fs.rmSync(workingDirectory, {recursive: true})
   })
 
   jest.setTimeout(120000)

Diff for: __tests__/updater.test.ts

@@ -76,7 +76,7 @@ describe('Updater', () => {
 
   afterEach(async () => {
     jest.clearAllMocks() // Reset any mocked classes
-    fs.rmdirSync(workingDirectory, {recursive: true})
+    fs.rmSync(workingDirectory, {recursive: true})
   })
 
   describe('when there is a happy path update', () => {

Diff for: dist/main/index.js

@@ -85,11 +85,11 @@ export class Updater {
     await proxy.shutdown()
 
     if (fs.existsSync(this.outputHostPath)) {
-      fs.rmdirSync(this.outputHostPath, {recursive: true})
+      fs.rmSync(this.outputHostPath, {recursive: true})
     }
 
     if (fs.existsSync(this.repoHostPath)) {
-      fs.rmdirSync(this.repoHostPath, {recursive: true})
+      fs.rmSync(this.repoHostPath, {recursive: true})
     }
   }
 }