fix units labels for max storage of volume

[oscaralvaro]

Description

This PR...
Change units from Gigabyte to Gibibyte for maximum size for a volume

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

[DaanHoogland]

text looks good

[codecov]

Codecov Report

Merging #8001 (686c774) into 4.18 (29c7b31) will increase coverage by 0.04%.
Report is 57 commits behind head on 4.18.
The diff coverage is 20.00%.

@@             Coverage Diff              @@
##               4.18    #8001      +/-   ##
============================================
+ Coverage     13.02%   13.06%   +0.04%     
- Complexity     9032     9105      +73     
============================================
  Files          2720     2720              
  Lines        257080   257500     +420     
  Branches      40088    40149      +61     
============================================
+ Hits          33476    33642     +166     
- Misses       219400   219629     +229     
- Partials       4204     4229      +25     

Files	Coverage Δ
...hestration/service/VolumeOrchestrationService.java	100.00% <ø> (ø)
.../main/java/com/cloud/network/IpAddressManager.java	100.00% <100.00%> (ø)
...ava/com/cloud/network/as/AutoScaleVmProfileVO.java	80.20% <100.00%> (+11.66%)	⬆️
...java/com/cloud/upgrade/DatabaseUpgradeChecker.java	40.89% <100.00%> (+0.64%)	⬆️
...va/com/cloud/upgrade/DatabaseVersionHierarchy.java	85.10% <100.00%> (+1.01%)	⬆️
.../api/command/admin/ratelimit/ResetApiLimitCmd.java	0.00% <ø> (ø)
...oud/hypervisor/kvm/resource/LibvirtConnection.java	0.00% <ø> (ø)
.../hypervisor/kvm/storage/ScaleIOStorageAdaptor.java	10.44% <100.00%> (ø)
...ava/com/cloud/api/commands/StopNetScalerVMCmd.java	0.00% <ø> (ø)
...tungsten/api/command/ListTungstenFabricTagCmd.java	0.00% <ø> (ø)
... and 53 more

... and 6 files with indirect coverage changes

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