fix: add iavl-cache-size config parsing to GetConfig (backport #10990) (#11058)

CHANGELOG.md

@@ -40,6 +40,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 ### Bug Fixes
 
 * (grpc) [\#10985](https://github.com/cosmos/cosmos-sdk/pull/10992) The `/cosmos/tx/v1beta1/txs/{hash}` endpoint returns a 404 when a tx does not exist.
+* [\#10990](https://github.com/cosmos/cosmos-sdk/pull/10990) Fixes missing `iavl-cache-size` config parsing in `GetConfig` method.
 
 ### Improvements
 

server/config/config.go

@@ -271,6 +271,7 @@ func GetConfig(v *viper.Viper) Config {
 			HaltTime:          v.GetUint64("halt-time"),
 			IndexEvents:       v.GetStringSlice("index-events"),
 			MinRetainBlocks:   v.GetUint64("min-retain-blocks"),
+			IAVLCacheSize:     v.GetUint64("iavl-cache-size"),
 		},
 		Telemetry: telemetry.Config{
 			ServiceName:             v.GetString("telemetry.service-name"),