Merge pull request #15891 from afscrome/improvemsgraphperf

Improve MS Graph Performance

.changeset/slow-carrots-sniff.md

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+---
+'@backstage/plugin-catalog-backend-module-msgraph': minor
+---
+
+Improve performance when loading users via group membership.
+Users data is now loaded from a paged query, rather than having to make an extra call per user to load each user's profiles.
+
+Note, there are still additional per user calls made to load user avatars

.changeset/young-points-drop.md

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+---
+'@backstage/plugin-catalog-backend-module-msgraph': patch
+---
+
+Increased default page size to 999 (from 100) to reduce the number of calls made to the Microsoft Graph API.