Add vpc key to returned VPC data on create

[mamercad]

SUMMARY

Fixes #276.

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

community.digitalocean.digital_ocean_vpc

[codecov]

Codecov Report

Merging #277 (8340680) into main (7c12b8b) will not change coverage.
The diff coverage is 66.66%.

@@           Coverage Diff           @@
##             main     #277   +/-   ##
=======================================
  Coverage   68.24%   68.24%           
=======================================
  Files          45       45           
  Lines        3549     3549           
  Branches      752      752           
=======================================
  Hits         2422     2422           
  Misses        801      801           
  Partials      326      326           

Flag	Coverage Δ
integration	67.63% <66.66%> (ø)
sanity	26.48% <0.00%> (ø)
units	64.80% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
plugins/modules/digital_ocean_vpc.py	64.44% <66.66%> (ø)

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