feat: TPU Create with spot

[Thoughtseize1]

Description

Checklist

• I have followed Sample Guidelines from AUTHORING_GUIDE.MD
• README is updated to include all relevant information
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• Please merge this PR for me once it is approved

[Thoughtseize1]

There is an issue here:

Right now I cannot create TPU with spot parameter because library is not updated yet.
Here are the current versions of libraries that we need to use for guaranteeing a spot on TPU.

• v.2 alpha1 - SchedulingConfig class
• v.2 - SchedulingConfig class

class SchedulingConfig(proto.Message):
    r"""Sets the scheduling options for this node.

    Attributes:
        preemptible (bool):
            Defines whether the node is preemptible.
        reserved (bool):
            Whether the node is created under a
            reservation.
    """

    preemptible: bool = proto.Field(
        proto.BOOL,
        number=1,
    )
    reserved: bool = proto.Field(
        proto.BOOL,
        number=2,
    )

Here’s available only 2 options right now:

• preemptible (❗which already deprecated in Google Cloud docs)
• reserved
  

@m-strzelczyk

[snippet-bot]

Here is the summary of changes.

You are about to add 1 region tag.

• tpu/create_tpu_spot.py:36, tag tpu_vm_create_spot

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