not possible to set a client timeout

**Describe the bug**
At the moment, it seems not possible to set a client timeout since node-fetch requires passing an AbortController instance to the fetch request option's signal.

** Client Version **
1.0.0-rc3

**To Reproduce**

**Expected behavior**
It would be great to set a client's timeout when creating a k8sApi instance or invoking a request

Start by tracing how the client is created and how requests are invoked, focusing on the node-fetch signal option and AbortController requirement described here. Done means a timeout can be configured when creating a k8sApi instance or when invoking a request, with the behavior verified through the relevant request path.

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