Fix eTaskGetState for pending ready tasks

[Dazza0]

Fix eTaskGetState for pending ready tasks

Description

The description of the eReady enum is inclusive of tasks that are pending ready

    eReady,       /* The task being queried is in a ready or pending ready list. */

However, the current implementation of the eTaskGetState function only checks a task's state list item, thus will return a non-eReady state for tasks that are pending ready.

Test Steps

1. From a main task, create a task_A.
2. task_A blocks/suspends itself
3. Main task calls vTaskSuspendAll()
4. Main task triggers an ISR. The ISR unblocks task_A
5. Main task then calls eTaskGetState on task_A which returns eBlocked/eSuspended even though task_A has been unblocked by the ISR.

Notes:

• We discovered this issue through one of our kernel unit tests. I can post the test source code here if that helps
• The SMP branch should also have the same issue. But I can raise a PR for the SMP branch once the fix for the mainline branch has been finalized.

Related Issue

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[aggarg]

Closing in favor of this one - #679