[WIP] Rename Gi/Mi size names to GiB/MiB

[jenny-s51]

https://issues.redhat.com/browse/RHOAIENG-291

WIP - needs clarity on whether or not to use concatenation for all instances in the UI where the units aren't explicitly declared as strings and come from the back end.

Description

Use GiB and MiB as the visual representation in the UI while keeping the current usage of Gi and Mi under the hood.

How Has This Been Tested?

Tested on Model Serving cluster.

1. Create a DS project.
2. Add a workbench.
3. Go to the "Cluster Storage" tab in the selected DS project.
4. Click "Add storage".
5. Go to kebab menu on

Test Impact

Tests already exist, units have been updated.

Request review criteria:

Self checklist (all need to be checked):

• The developer has manually tested the changes and verified that the changes work
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has added tests or explained why testing cannot be added (unit or cypress tests for related changes)

If you have UI changes:

• Included any necessary screenshots or gifs if it was a UI change.
• Included tags to the UX team if it was a UI/UX change.

After the PR is posted & before it merges:

• The developer has tested their solution on a cluster by using the image produced by the PR to main

[jenny-s51]

Applied feedback from @jeff-phillips-18 and @christianvogt. Closing in favor of opendatahub-io#3338.