Adding snapshotter.type flag install command

[davidcassany]

Part of rancher/elemental#1241

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 80.64516% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 72.56%. Comparing base (e56244d) to head (361b2c0).

Files	Patch %	Lines
pkg/types/v1/snapshotter.go	62.50%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1987      +/-   ##
==========================================
+ Coverage   72.50%   72.56%   +0.05%     
==========================================
  Files          76       76              
  Lines        8883     8894      +11     
==========================================
+ Hits         6441     6454      +13     
+ Misses       1910     1907       -3     
- Partials      532      533       +1     

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[anmazzotti]

Looks good!