timeout check triggers when expanding a set of tests in standalone

[greggman]

No description provided.

[greggman]

@kainino0x you added that timeout. The issue is for example, go to

https://gpuweb.github.io/cts/standalone/?debug=1&runnow=1&q=webgpu:shader,execution,expression,call,builtin,textureGather:*

As it's running, click the triangle to expand the list of tests under sampler_2d_array. Result is it times-out the running test as the expansion takes too long.

[kainino0x]

I can't repro easily on my mac, where is the timeout code?

I'm guessing we should just make the timeout longer, it was probably just meant to avoid infinite loops or something... not sure.