chore(*): add mathlib4 synchronization comments (#19220)
Regenerated from the [port status wiki page](https://github.com/leanprover-community/mathlib/wiki/mathlib4-port-status).
Relates to the following files:
* `algebra.category.fgModule.limits`
* `algebra.homology.differential_object`
* `algebraic_geometry.AffineScheme`
* `algebraic_geometry.gluing`
* `algebraic_geometry.limits`
* `algebraic_geometry.properties`
* `algebraic_geometry.pullbacks`
* `linear_algebra.clifford_algebra.even`
* `number_theory.legendre_symbol.norm_num`
* `number_theory.zeta_function`
* `order.category.omega_complete_partial_order`
* `ring_theory.witt_vector.frobenius_fraction_field`
* `set_theory.game.nim`
* `set_theory.surreal.dyadic`
* `topology.sheaves.skyscraper`
