Clarify VMware import conversion storage option

[andrijapanicsb]

Description

This updates the VMware-to-KVM import form copy for the optional conversion storage selector.

The previous label used "staging storage", which can be confused with CloudStack secondary staging storage. In this flow, the selected storage is the temporary location where virt-v2v writes converted disks before CloudStack imports them to the destination storage pool.

Changes

• Rename the selector text to "(Optional) Select temporary conversion storage".
• Add a tooltip explaining that virt-v2v temporarily writes converted disks there before import.
• Add an optional tooltip prop to CheckBoxSelectPair so this can be shown next to the checkbox label.

Testing

• Parsed ui/public/locales/en.json successfully with Node.
• Ran git diff --check successfully.

Related documentation PR: apache/cloudstack-documentation#651 (#651).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 18.09%. Comparing base (5893ba5) to head (a02a8de).

Additional details and impacted files

@@            Coverage Diff            @@
##               main   #13165   +/-   ##
=========================================
  Coverage     18.09%   18.09%           
  Complexity    16723    16723           
=========================================
  Files          6037     6037           
  Lines        542580   542580           
  Branches      66427    66427           
=========================================
+ Hits          98155    98157    +2     
+ Misses       433399   433398    -1     
+ Partials      11026    11025    -1     

Flag	Coverage Δ
uitests	3.51% <ø> (ø)
unittests	19.25% <ø> (+<0.01%)	⬆️

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