Clear Replace column for Track 2 packages (Azure#9706)

* Clear Replace column for Track 2 packages (rebased on main)

Re-apply Replace column clearing for New=True packages on top of
current main. Clears 173 Replace values across 4 CSV files:
- dotnet-packages.csv: 41
- go-packages.csv: 16
- js-packages.csv: 77
- python-packages.csv: 39

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Set Replace=NA for deprecated Track 2 packages with empty Replace

The Verify Site CI check requires deprecated packages to have a Replace
value. Our prior commit cleared Replace for all Track 2 (New=True)
packages, but some of those are deprecated. Setting Replace='NA' for
these 147 packages (74 JS, 24 .NET, 33 Python, 16 Go) explicitly
acknowledges there is no replacement package.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

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Co-authored-by: Ronnie Geraghty <ronniegeraghty@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: ronniegeraghty