unify algorithms for masking and migration

.changeset/itchy-penguins-worry.md

@@ -0,0 +1,5 @@
+---
+"@apollo/client": patch
+---
+
+Fix issue where masked data would sometimes get returned when the field was part of a child fragment from a fragment unmasked by the parent query.

.changeset/mean-bottles-travel.md

@@ -0,0 +1,5 @@
+---
+"@apollo/client": patch
+---
+
+Fix issue where the warning emitted by `@unmask(mode: "migrate")` would trigger unnecessarily when the fragment was used alongside a masked fragment inside an inline fragment.

.changeset/wicked-pans-appear.md

@@ -0,0 +1,5 @@
+---
+"@apollo/client": patch
+---
+
+Fix issue that threw errors when masking partial data with `@unmask(mode: "migrate")`.

.size-limits.json

@@ -1,4 +1,4 @@
 {
-  "dist/apollo-client.min.cjs": 41638,
-  "import { ApolloClient, InMemoryCache, HttpLink } from \"dist/index.js\" (production)": 34394
+  "dist/apollo-client.min.cjs": 41756,
+  "import { ApolloClient, InMemoryCache, HttpLink } from \"dist/index.js\" (production)": 34505
 }