Update etcd restore docs

[taneyland]

Issue #, if available:

Description of changes:
Updating these docs to clarify & highlight some of the steps. WIP

Testing (if applicable):

Documentation added/planned (if applicable):

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.60%. Comparing base (4583834) to head (fc3ecd0).
Report is 137 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7658      +/-   ##
==========================================
+ Coverage   73.48%   73.60%   +0.12%     
==========================================
  Files         579      588       +9     
  Lines       36357    37150     +793     
==========================================
+ Hits        26718    27346     +628     
- Misses       7875     8013     +138     
- Partials     1764     1791      +27     

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