fix some permissions in a few rust repos

The permissions here look like they're generally a mess, but this should
make the situation a little better.

github/ipld.yml

@@ -1261,12 +1261,6 @@ repositories:
     advanced_security: false
     allow_update_branch: false
     archived: false
-    collaborators:
-      admin:
-        - Stebalien
-      push:
-        - dvc94ch
-        - molekilla
     default_branch: master
     description: Rust IPLD library
     files:
@@ -1306,9 +1300,6 @@ repositories:
     advanced_security: false
     allow_update_branch: false
     archived: false
-    collaborators:
-      push:
-        - vmx
     default_branch: main
     description: This crate provides core types for interoperating with IPLD.
     has_discussions: false
@@ -1321,15 +1312,13 @@ repositories:
     teams:
       pull:
         - github-mgmt stewards
+      push:
         - Rust Team
     visibility: public
   rust-ipld-dagpb:
     advanced_security: false
     allow_update_branch: false
     archived: false
-    collaborators:
-      push:
-        - vmx
     default_branch: main
     description: IPLD DAG-PB codec.
     has_discussions: false
@@ -1342,6 +1331,7 @@ repositories:
     teams:
       pull:
         - github-mgmt stewards
+      push:
         - Rust Team
     visibility: public
   rust-ipld-extract-links:
@@ -1372,9 +1362,6 @@ repositories:
     advanced_security: false
     allow_update_branch: false
     archived: false
-    collaborators:
-      push:
-        - vmx
     default_branch: main
     description: IPLD DAG-JSON support for Serde.
     has_discussions: false
@@ -1387,6 +1374,7 @@ repositories:
     teams:
       pull:
         - github-mgmt stewards
+      push:
         - Rust Team
     visibility: public
   specs: