DW: Use 1-2 decimal places for all GiB and memory values, or 3 places for tooltips

[mturley]

Addresses feedback related to RHOAIENG-2845, RHOAIENG-2848 and RHOAIENG-2844

Description

• Consolidates previously redundant util functions used for unit conversion and rounding numbers
• Standardizes the precision of numbers in Distributed Workloads views:
  • For numbers rendered directly on the page, 1 or 2 decimal places are used (2 decimal places for values under 0.1 so they are not rounded to 0, which is the existing behavior for storage capacity elsewhere in the dashboard).
  • For numbers rendered in tooltips, 3 decimal places are used. This is consistent with how precise numbers are shown in the OpenShift console.
• Shows units for all numbers in tooltips, in case the tooltip covers up the unit displayed in the chart subtitle.
• Also standardizes the props passed into CPU/Memory chart components with metricLabel and unitLabel props for consistency, and refactors the TopResourceConsumingWorkloadsChart to simplify how data is passed in.

cc @xianli123 @cfullam1 @yannnz

How Has This Been Tested?

Test Impact

Request review criteria:

Self checklist (all need to be checked):

• The developer has manually tested the changes and verified that the changes work
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• The developer has added tests or explained why testing cannot be added (unit or cypress tests for related changes)

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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

[lucferbux]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gitdallas, lucferbux

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[mturley]

/retest

[openshift-ci]

New changes are detected. LGTM label has been removed.