[DNS] Support GetRecordsRequest object for more granular filtering in Zone.replaceRecords()

### A screenshot that you have tested with "Try this API".

Currently, the replaceRecords method in the DNS Zone class only accepts a recordType parameter (string or string[]) for filtering records to delete before adding new ones. This is overly restrictive as it deletes ALL records of the specified type(s).

### Current signature:

```ts
replaceRecords(recordType: string | string[], records: Record | Record[]): Promise
```

### Current behavior:

```ts
await zone.replaceRecords("A", recordObject)
// This deletes ALL "A" records in the zone, which is often not desired
```

### What would you like to see in the library?

Allow the first parameter to accept a [GetRecordsRequest-like](https://github.com/googleapis/google-cloud-node/blob/0e789bac8803a06904ec0870f3a8c35826c1f161/packages/google-cloud-dns/src/zone.ts#L889) object for more granular filtering, enabling users to specify additional criteria like record name.

```ts
replaceRecords(
filter: string | string[] | GetRecordsRequest,
records: Record | Record[]
): Promise
```

### Desired usage:

```ts
await zone.replaceRecords({ type: "A", name: "oldRecordName" }, recordObject)
// This would only delete "A" records with the specific name "oldRecordName"
```

### Describe alternatives you've considered

Currently, users must manually:

- Query existing records with specific filters
- Create the DNS change manually

### Additional context/notes

_No response_