[techsupport] include APPL_STATE_DB dump (#2607)

- What I did
I added APPL_STATE_DB to techsupport dump

- How I did it
Added a call to save APPL_STATE_DB

- How to verify it
Run techsupport and verify dump/APPL_STATE_DB.json

Signed-off-by: Stepan Blyschak <stepanb@nvidia.com>

scripts/generate_dump

@@ -752,6 +752,7 @@ save_redis_info() {
     save_redis "CONFIG_DB" "CONFIG_DB" remove_secret_from_config_db_dump
     save_redis "FLEX_COUNTER_DB"
     save_redis "STATE_DB"
+    save_redis "APPL_STATE_DB"
 }
 
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