add marc and move bharathi-tenneti to sdk-emeritus-approvers (#4019)

Author: camilamacedo86

OWNERS_ALIASES

@@ -10,6 +10,7 @@ aliases:
   - jmccormick2001
   - jmrodri
   - asmacdo
+  - marc-obrien
 
   # Contributors who can approve any PRs in the repo.
   sdk-approvers:
@@ -18,7 +19,6 @@ aliases:
   - fabianvf
   - varshaprasad96
   - rashmigottipati
-  - bharathi-tenneti
 
   # Contributors who can review and LGTM any PRs in the repo.
   sdk-reviewers:
@@ -29,3 +29,4 @@ aliases:
   sdk-emeritus-approvers:
   - shawn-hurley
   - hasbro17
+  - bharathi-tenneti