[COST-4394] Fixing OCI GB and TB calculations

[bacciotti]

Jira Ticket

COST-4394

Description

This change will fix the calculations regarding the OCI conversion from bytes to Gigabytes and from Terabytes/millisecond to Gigabytes/Month, considering that we are using the Decimal Standard, and we have stated that we should use the GB unit.

In the former code, power(2, -30) is used, which is equivalent to dividing by 2^30. This is the conversion factor for bytes to Gibibytes (GiB), where 1 GiB = 2^30 bytes.

This change will fix it, replacing by * power(10, -9), which is equivalent to dividing by 10^9. This is the conversion factor for bytes to Gigabytes (GB), where 1 GB = 10^9 bytes.

When it comes to the TB_MS side, according to the Decimal Standard, we have to multiply by 1000 instead of 1024 (which would convert to GiB).

[codecov]

Codecov Report

Merging #4974 (4ac2d6b) into main (336da02) will increase coverage by 0.0%.
The diff coverage is n/a.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #4974   +/-   ##
=====================================
  Coverage   94.0%   94.1%           
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  Files        375     375           
  Lines      31124   31124           
  Branches    3697    3697           
=====================================
+ Hits       29272   29274    +2     
+ Misses      1181    1178    -3     
- Partials     671     672    +1     

[bacciotti]

/retest