Autorest fails to run model-validation: true with latest oav tool

**Before filling a bug**

- [x] have you checked the [faq](https://github.com/Azure/autorest/tree/main/docs/faq.md) for known issues.
- [x] have you checked existing issues

**Describe the bug**
1) It appears that autorest is using a fairly outdated oav plugin version (0.4.20 << current v3.2.0) and also breaks when forcing use of that version with use-extension: oav: "~3.2.0"

2) Even after verifying that my manifest passes with direct use of oav (npm install -g oav@3.2.0) and with the use of other versions of oav I still see that autorest fails with the following error:

```bash
autorest pkg/ucp/api/README.md --tag=ucp-2022-09-01-privatepreviewAutoRest code generation utility [cli version: 3.6.2; node: v18.11.0]
(C) 2018 Microsoft Corporation.
https://aka.ms/autorest
info | Loading AutoRest core '/home/asilverman/.autorest/@autorestcore@3.9.3/nodemodules/@autorest/core/dist' (3.9.3)
info | Loading AutoRest extension 'oav' (~3.2.0->3.2.0)
info | Loading AutoRest extension '@autorest/go' (4.0.0-preview.44->4.0.0-preview.44)
info | Loading AutoRest extension '@autorest/modelerfour' (4.23.1->4.23.1)
node:internal/modules/cjs/loader:998
throw err;
^
Error: Cannot find module '/home/asilverman/.autorest/oav@3.2.0/node_modules/oav/dist/lib/autorestPlugin/pluginHost.js'
at Module._resolveFilename (node:internal/modules/cjs/loader:995:15)
at Module._load (node:internal/modules/cjs/loader:841:27)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
at node:internal/main/run_main_module:23:47 {
code: 'MODULE_NOT_FOUND',
requireStack: []
}
Node.js v18.11.0
fatal | Process() cancelled due to failure
error | [Exception] AutoRest extension 'oav' terminated.
error | Error: [Exception] AutoRest extension 'oav' terminated.
error | Autorest completed with an error. If you think the error message is unclear, or is a
```
Please provide as much information as you can. This would be:
- OpenAPI files having the issues
- Autorest command used

### Autorest Version
```bash
autorest --version
AutoRest code generation utility [cli version: 3.6.2; node: v18.11.0]
(C) 2018 Microsoft Corporation.
https://aka.ms/autorest

Showing All Installed Extensions

Type Extension Name Version Location
core @autorest/core 3.9.3 /home/asilverman/.autorest/@autorest_core@3.9.3
extension @autorest/go 4.0.0-preview.44 /home/asilverman/.autorest/@autorest_go@4.0.0-preview.44
extension @autorest/modelerfour 4.23.1 /home/asilverman/.autorest/@autorest_modelerfour@4.23.1
core @microsoft.azure/autorest-core 2.0.4421 /home/asilverman/.autorest/@microsoft.azure_autorest-core@2.0.4421
extension @microsoft.azure/classic-openapi-validator 1.0.14 /home/asilverman/.autorest/@microsoft.azure_classic-openapi-validator@1.0.14
extension @microsoft.azure/openapi-validator 1.0.4 /home/asilverman/.autorest/@microsoft.azure_openapi-validator@1.0.4
extension @microsoft.azure/openapi-validator 1.13.0 /home/asilverman/.autorest/@microsoft.azure_openapi-validator@1.13.0
extension oav 0.4.20 /home/asilverman/.autorest/oav@0.4.20
extension oav 0.4.34 /home/asilverman/.autorest/oav@0.4.34
extension oav 0.4.70 /home/asilverman/.autorest/oav@0.4.70
extension oav 3.1.0 /home/asilverman/.autorest/oav@3.1.0
extension oav 3.2.0 /home/asilverman/.autorest/oav@3.2.0
```

#### OpenAPI Files
[2022-09-01-privatepreview.zip](https://github.com/Azure/autorest/files/9966063/2022-09-01-privatepreview.zip)

#### autorest configuration
[README.md](https://github.com/Azure/autorest/files/9966073/README.md)

```

**Expected behavior**
I expect autorest to run oav tool without failure

**Additional context**
Add any other context about the problem here.

Reproduce the failure with the attached README.md and the reported AutoRest command while forcing oav@3.2.0. Start from the missing oav/dist/lib/autorestPlugin/pluginHost.js path and compare it with the installed package layout; done means model-validation: true runs without the module-not-found error.

Written by the indexing model from the issue text.