(tree): Updated makeModularChangeset and related functions to take a …

…property bag (microsoft#22699)

From
microsoft#22525 (comment).

Updated `makeModularChangeset`, `buildModularChangesetFromField` and
`buildModularChangesetFromNode` to take a property bag as parameter.
These functions take a lot of parameters and it's currently a little
hard to tell them apart from calling them. Having a property bag makes
the parameters clear.