The `fromStream` method is deprecated. Please use the `JWT` constructor with a parsed stream instead.

### Please make sure you have searched for information in the following guides.

- [x] Search the issues already opened: https://github.com/GoogleCloudPlatform/google-cloud-node/issues
- [x] Search StackOverflow: http://stackoverflow.com/questions/tagged/google-cloud-platform+node.js
- [x] Check our Troubleshooting guide: https://github.com/googleapis/google-cloud-node/blob/main/docs/troubleshooting.md
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### A screenshot that you have tested with "Try this API".

This commit in google-auth-library is causing SecretManagerServiceClient to spit out console errors

https://github.com/googleapis/google-auth-library-nodejs/pull/2143/files

### Solution
migrate away from fromStream and fromJSON to the newer implementations which also validates the input.

### Link to the code that reproduces this issue. A link to a **public** Github Repository or gist with a minimal reproduction.

https://gist.github.com/leon/1ffa1b5ce77fad53ccdec8540cf77841

### A step-by-step description of how to reproduce the issue, based on the linked reproduction.

### Minimal reproduction

```typescript
import { SecretManagerServiceClient } from '@google-cloud/secret-manager'

const secretClient = new SecretManagerServiceClient()
const secretResponse = await secretClient.accessSecretVersion({ name: 'projects/123123123123/secrets/my-secret/versions/latest' })
```

Will output

```bash
The `fromStream` method is deprecated. Please use the `JWT` constructor with a parsed stream instead. For more details, see https://cloud.google.com/docs/authentication/external/externally-sourced-credentials.

The `fromJSON` method is deprecated. Please use the `JWT` constructor instead. For more details, see https://cloud.google.com/docs/authentication/external/externally-sourced-credentials.
```

### A clear and concise description of what the bug is, and what you expected to happen.

when calling the secrets apis we should not get console.warn messages

### A clear and concise description WHY you expect this behavior, i.e., was it a recent change, there is documentation that points to this behavior, etc. **

The recent changes to the security holes in fromJSON, fromStream.

https://github.com/googleapis/google-auth-library-nodejs/pull/2143/files