…eoutError` with builtin `TimeoutError` (pythonGH-30197)

Co-authored-by: Andrew Svetlov <[email protected]>

* raise task exceptions in python task futures

* wrap FutureFunctionCall tracebacks in FunctionCallNoResult

* Raise TimeoutError in Future when task result is pending

* yield futures and raise TimeoutError in as_completed

* Improve error handling in wait

* Import TimeoutError for Python <3.10 compatibility

In Python 3.9 and older, concurrent.futures used its own TimeoutError
class rather than the builtin. TimeoutError is aliased to the builtin in
layer Python versions, so for backwards compatibility we import it in
the test file.

See python/cpython#30197

…rative-computing-lab#3922)

* raise task exceptions in python task futures

* wrap FutureFunctionCall tracebacks in FunctionCallNoResult

* Raise TimeoutError in Future when task result is pending

* yield futures and raise TimeoutError in as_completed

* Improve error handling in wait

* Import TimeoutError for Python <3.10 compatibility

In Python 3.9 and older, concurrent.futures used its own TimeoutError
class rather than the builtin. TimeoutError is aliased to the builtin in
layer Python versions, so for backwards compatibility we import it in
the test file.

See python/cpython#30197

* raise task exceptions in python task futures

* wrap FutureFunctionCall tracebacks in FunctionCallNoResult

* Raise TimeoutError in Future when task result is pending

* yield futures and raise TimeoutError in as_completed

* Improve error handling in wait

* Import TimeoutError for Python <3.10 compatibility

In Python 3.9 and older, concurrent.futures used its own TimeoutError
class rather than the builtin. TimeoutError is aliased to the builtin in
layer Python versions, so for backwards compatibility we import it in
the test file.

See python/cpython#30197