Remove retry logic from PXE JSON RPC client

[olehmisar]

PXE RPC client retries a few times when a request fails to execute. This is annoying when proving is enabled because it will try to generate the same failing proof multiple times, which is very slow. It is confusing seeing errors in the pxe terminal while the TX in aztec.js (.send().wait()) is still pending

this is especially frustrating in CI and js tests

looks like can be mitigated by

const noRetryFetch = makeFetch([], true);
createPXEClient(pxeUrl, noRetryFetch);

but would be cool if it was the default.

From: https://discord.com/channels/1144692727120937080/1329873571857825914