Rename some of the YAML properties to shorter names

[peterschmidt85]

1. spot_policy: spot|on-demand|auto -> spot: true|false|auto
2. retry_policy: {retry: true|false, duration: int|str} -> retry_duration: int|str|off
3. creation_policy: create|reuse|reuse-or-create -> reuse: false|true|auto
4. termination_policy: dont-destroy|destroy-after-idle & termination_idle_time: int|str -> idle_duration: int|str|off
5. pool_name: str -> pool: str

[r4victor]

Looks good overall. Some notes:

1. We're going to introduce new retry policies in #1200 so retry_duration alone is not sufficient. Let's do not touch retry_policy in this issue.
2. Regarding creation_policy, we don't have creation_policy: create. The addition of new policy should be discussed outside of renaming issue. Also, it's unclear what reuse: false|true|auto means. reuse: true may be misleading since it doesn't simply allows reuse but forces it. creation_policy: reuse|reuse-or-create is more clear. I'm against renaming this particular field as suggested.

[r4victor]

retry_policy renamed in #1200

[peterschmidt85]

This issue is stale because it has been open for 30 days with no activity.

[peterschmidt85]

This issue was closed because it has been inactive for 14 days since being marked as stale. Please reopen the issue if it is still relevant.

[peterschmidt85]

We still need to rename termination_idle_time: int|str -> idle_duration: int|str|off

[github-actions[bot]]

This issue is stale because it has been open for 30 days with no activity.