feat: Remove MarkAsPushed feature

[lenny-goodell]

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

MarkAsPush feature exists in SDK

Issue Number: #594

What is the new behavior?

MarkAsPush feature no longer exists in SDK

Does this PR introduce a breaking change?

• Yes
• No

Are there any new imports or modules? If so, what are they used for and why?

no

Are there any specific instructions or things that should be known prior to reviewing?

Other information

[codecov-io]

Codecov Report

Merging #607 (481aa38) into master (2bc84c3) will decrease coverage by 0.76%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #607      +/-   ##
==========================================
- Coverage   61.62%   60.86%   -0.77%     
==========================================
  Files          30       30              
  Lines        1798     1763      -35     
==========================================
- Hits         1108     1073      -35     
  Misses        618      618              
  Partials       72       72              

Impacted Files	Coverage Δ
appcontext/context.go	73.07% <ø> (-6.93%)	⬇️
appsdk/configurable.go	54.07% <ø> (-0.34%)	⬇️
internal/runtime/runtime.go	70.12% <ø> (-1.48%)	⬇️
internal/runtime/storeforward.go	54.47% <ø> (-1.44%)	⬇️
internal/store/db/redis/models/storedobject.go	96.82% <ø> (-0.51%)	⬇️
pkg/transforms/coredata.go	72.72% <ø> (-7.28%)	⬇️

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[rsdmike]

We'll need to make dure docs and examples are updated to remove this stuff

[lenny-goodell]

We'll need to make sure docs and examples are updated to remove this stuff

Yup, I have created issues for those updates.