Algosdk fails parsing JSON from error response when there is no JSON data in the response.

### Subject of the issue

Algosdk fails parsing JSON from error response when there is no JSON data in the response.

### Steps to reproduce

It's difficult to reproduce but I can show you exactly where the problem is.

### Expected behaviour

My sandbox is returning a 504 status code from this route `algod/v2/transactions/params`.

When calling `algoClient.getTransactionParams().do()` it should print a reasonable error message.

### Actual behaviour

Algosdk attempts to parse JSON data from the error response when there is no JSON data resulting in the following unreasonable error message:

```
SyntaxError: Unexpected token E in JSON at position 0
at JSON.parse ()
at Function.parseJSON (client.ts:125:8)
at Function.prepareResponse (client.ts:187:12)
at Function.prepareResponseError (client.ts:209:33)
at HTTPClient.get (client.js:186:30)
at processTicksAndRejections (node:internal/process/task_queues:96:5)
```

The attempt to parse JSON is made here: https://github.com/algorand/js-algorand-sdk/blob/447816198ada99663dbc1c5cfa8df41d9e5124cd/src/client/client.ts#L126

The problem originates from this request here: https://github.com/algorand/js-algorand-sdk/blob/447816198ada99663dbc1c5cfa8df41d9e5124cd/src/client/client.ts#L233

When the sandbox has a problem (for me it is status 504 at the moment) it throws an error with no JSON in the response which is handled here: https://github.com/algorand/js-algorand-sdk/blob/447816198ada99663dbc1c5cfa8df41d9e5124cd/src/client/client.ts#L233

It tries to parse the response from `err.response` which is not JSON so it throws the aforementioned error.