feat(instance): render block volumes details when getting a server

[Mia-Cross]

Closes #4399

[codecov-commenter]

Codecov Report

❌ Patch coverage is 65.21739% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.11%. Comparing base (5bf53e0) to head (f1627fe).
⚠️ Report is 1048 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/namespaces/instance/v1/custom_server.go	65.21%	16 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (5bf53e0) and HEAD (f1627fe). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (5bf53e0)	HEAD (f1627fe)
	2	1

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #4633       +/-   ##
===========================================
- Coverage   75.45%   55.11%   -20.35%     
===========================================
  Files         202      308      +106     
  Lines       44323    70082    +25759     
===========================================
+ Hits        33444    38623     +5179     
- Misses       9653    30061    +20408     
- Partials     1226     1398      +172     

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