Add ai-training OWNERS team and reserve experimental/air

.github/OWNERS

@@ -72,4 +72,6 @@
 /libs/clicompat/                 team:eng-apps-devex team:platform
 
 # Experimental
+/experimental/air/             team:ai-training
+/acceptance/experimental/air/  team:ai-training
 /experimental/aitools/      team:eng-apps-devex @lennartkats-db

.github/OWNERTEAMS

@@ -16,3 +16,4 @@ team:bundle     @andrewnester @anton-107 @denik @janniklasrose @pietern @shreyas
 team:platform   @simonfaltum @renaudhartert-db @hectorcast-db @parthban-db @tanmay-db @Divyansh-db @tejaskochar-db @mihaimitrea-db @chrisst @rauchy
 team:eng-apps-devex @fjakobs @Shridhad @atilafassina @keugenek @igrekun @pkosiec @MarioCadenas @pffigueiredo @ditadi @calvarjorge
 team:eng-sandbox @pietern @shuochen0311 @akshaysingla-db @anwell-db @samhuan-db
+team:ai-training @apeforest @bfontain @lu-wang-dl @panchalhp-db @vinchenzo-db @maggiewang-db @riddhibhagwat-db @ben-hansen-db @pardis-beikzadeh-db