Feature/update bulk ops serialization

[ElizabethOkerio]

Issues

This pull request fixes #xxx.

Description

This pull request is a sub of this big PR #2656. We have broken the big PR into 3PRs - deserialization/serialization/ApiHandlers to hasten the review. This PR contains only serialization changes for bulk operations.

This PR adds changes for serializing a DeltaSet. This is a new structure for bulk operations.
We've removed changes for serializing a response in a deep insert in this pr as there are some redesigning that need to be done for proper serialization to the required level to happen.

Checklist (Uncheck if it is not completed)

• Test cases added
• Build and test with one-click build and test script passed

Additional work necessary

If documentation update is needed, please add "Docs Needed" label to the issue and provide details about the required document change in the issue.

[habbes]

Could you add some context and overview of the changes in the description?

[pull-request-quantifier-deprecated]

This PR has 677 quantified lines of changes. In general, a change size of upto 200 lines is ideal for the best PR experience!

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Quantification details

Label      : Extra Large
Size       : +627 -50
Percentile : 89.23%

Total files changed: 21

Change summary by file extension:
.cs : +580 -44
.projitems : +1 -0
.csproj : +4 -0
.bsl : +42 -6

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[gathogojr]

LGTM