Added totalBytesSkipped and using this in percentage complete calculation

[StefanNestorovski]

Description

Added a new object called "TotalBytesSkipped" which stores the amount of data skipped during file copying. This TotalBytesSkipped is added to all the summary messages as well as used in the "Percentage complete" calculation.

• Bug Fix: "Percentage complete" reporting does not take into account skipped files with --overwrite=ifSourceNewer

• Related Links:

• [Issues]("Percentage complete" reporting does not take into account skipped files with --overwrite=ifSourceNewer #2830)

Type of Change

• [x ] Bug fix
• New feature
• Documentation update required
• Code quality improvement
• Other (describe):

How Has This Been Tested?

Tested on windows 11 only:
Ran AzCopy with "--overwrite=ifSourceNewer" on a folder containing some new files and some files already in blob, output % was correctly measured with the skips included.
Ran AzCopy with "--overwrite=ifSourceNewer" on a folder where all the data was already in the blob and all data was skipped and output was still displaying 100% done.

Thank you for your contribution to AzCopy!

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