Add IEC format for digital units

What does this MR do?

The IEC recommends using binary scales with the units.

This MR adds IEC style format for digital units, such as KiB and MiB in addition to kB and MB which use decimal.

Old bytes decimal format is renamed to decimalBytes, while bytes rightfully switches to binary unit scale.

Screenshots

No changes to for the user yet.

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team

Related #201999 (closed)