instance: add create by snapshot

[resmo]

Description

add option to create instance by snapshot

Related Issues

closes #55

Checklist:

• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you linted your code locally prior to submission?
• Have you successfully ran tests with your changes locally?

[codecov-commenter]

Codecov Report

Base: 92.01% // Head: 64.67% // Decreases project coverage by -27.34% ⚠️

Coverage data is based on head (f4744c4) compared to base (5ed7df2).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #56       +/-   ##
===========================================
- Coverage   92.01%   64.67%   -27.34%     
===========================================
  Files          25        3       -22     
  Lines         751      402      -349     
  Branches      118       56       -62     
===========================================
- Hits          691      260      -431     
- Misses         23      141      +118     
+ Partials       37        1       -36     

Impacted Files	Coverage Δ
...tions/vultr/cloud/plugins/module_utils/vultr_v2.py	18.78% <0.00%> (-73.34%)	⬇️
...vultr/cloud/plugins/modules/startup_script_info.py
...ctions/vultr/cloud/plugins/modules/account_info.py
...lections/vultr/cloud/plugins/modules/dns_domain.py
...ons/vultr/cloud/plugins/modules/plan_metal_info.py
...ctions/vultr/cloud/plugins/modules/ssh_key_info.py
...ble_collections/vultr/cloud/plugins/modules/vpc.py
...ions/vultr/cloud/plugins/modules/firewall_group.py
...tions/vultr/cloud/plugins/modules/block_storage.py
...tions/vultr/cloud/plugins/modules/firewall_rule.py
... and 17 more

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[resmo]

successfully tested using a manual uploaded snapshot (raw image), once the snapshot module is ready, I'll extend the tests case.