[Infra] Add beam_viewer and beam_writer roles for GSoC 2026 participant (#38933)

* Request read and write permissions on the Beam project for GSoC 2026

* Fix: Placing my username in the correct alphabetical order

Author: HansMarcus01

infra/iam/users.yml

@@ -486,6 +486,12 @@
   - role: roles/cloudfunctions.invoker
   - role: roles/iam.serviceAccountTokenCreator
   - role: roles/storage.objectViewer
+- username: hansmarcus
+  email: hansmarcus14@gmail.com
+  member_type: user
+  permissions:
+  - role: projects/apache-beam-testing/roles/beam_viewer
+  - role: projects/apache-beam-testing/roles/beam_writer
 - username: harrisonlim
   email: harrisonlim@google.com
   member_type: user
@@ -1241,4 +1247,4 @@
   member_type: user
   permissions:
   - role: projects/apache-beam-testing/roles/beam_viewer
-  - role: projects/apache-beam-testing/roles/beam_writer
+  - role: projects/apache-beam-testing/roles/beam_writer