Update OWNERS approvers and reviewers: pkg/api

pkg/api/rest/OWNERS

@@ -0,0 +1,35 @@
+reviewers:
+- thockin
+- smarterclayton
+- wojtek-t
+- deads2k
+- brendandburns
+- derekwaynecarr
+- caesarxuchao
+- mikedanese
+- liggitt
+- nikhiljindal
+- bprashanth
+- gmarek
+- kargakis
+- justinsb
+- roberthbailey
+- ncdc
+- eparis
+- timothysc
+- dims
+- hongchaodeng
+- krousey
+- jszczepkowski
+- euank
+- markturansky
+- fgrzadkowski
+- satnam6502
+- fabioy
+- ingvagabund
+- david-mcmahon
+- jianhuiz
+- nhlfr
+- feihujiang
+- sdminonne
+- goltermann