[SPARK-33797][SS][DOCS] Update SS doc about State Store and task locality
[SPARK-33797][SS][DOCS] Update SS doc about State Store and task locality

### What changes were proposed in this pull request?

This updates SS documentation to document about State Store and task locality.

### Why are the changes needed?

During running some tests for structured streaming, I found state store locality becomes an issue sometimes and it is not very straightforward for end-users. It'd be great if we can document it.

### Does this PR introduce _any_ user-facing change?

No, only doc change.

### How was this patch tested?

No, only doc change.

Closes #30789 from viirya/ss-statestore-doc.

Authored-by: Liang-Chi Hsieh <d24118b4297e1ecf0c990d6935f5f9e6e4fd7701@gmail.com>
Signed-off-by: Jungtaek Lim <6dfb5872701d21af1c4dd7add991df02fba61fbf@gmail.com>

apache/spark,taroplus/spark,JoshRosen/spark,shaneknapp/spark,wangmiao1981/spark,zzcclp/spark,apache/spark,maropu/spark,chuckchen/spark,zzcclp/spark,srowen/spark,dongjoon-hyun/spark,WeichenXu123/spark,JoshRosen/spark,JoshRosen/spark,ueshin/apache-spark,taroplus/spark,holdenk/spark,xuanyuanking/spark,witgo/spark,dongjoon-hyun/spark,jiangxb1987/spark,mahak/spark,maropu/spark,cloud-fan/spark,witgo/spark,wangmiao1981/spark,vinodkc/spark,holdenk/spark,JoshRosen/spark,WeichenXu123/spark,JoshRosen/spark,cloud-fan/spark,shaneknapp/spark,milliman/spark,cloud-fan/spark,wangyum/spark,BryanCutler/spark,holdenk/spark,milliman/spark,vinodkc/spark,gengliangwang/spark,vinodkc/spark,zero323/spark,dongjoon-hyun/spark,WeichenXu123/spark,chuckchen/spark,HyukjinKwon/spark,zero323/spark,zero323/spark,gengliangwang/spark,holdenk/spark,srowen/spark,witgo/spark,taroplus/spark,apache/spark,ueshin/apache-spark,shaneknapp/spark,wangmiao1981/spark,rednaxelafx/apache-spark,JoshRosen/spark,BryanCutler/spark,BryanCutler/spark,cloud-fan/spark,srowen/spark,ueshin/apache-spark,zero323/spark,maropu/spark,witgo/spark,holdenk/spark,nchammas/spark,xuanyuanking/spark,hvanhovell/spark,HyukjinKwon/spark,rednaxelafx/apache-spark,wangyum/spark,maropu/spark,zzcclp/spark,apache/spark,WeichenXu123/spark,dongjoon-hyun/spark,shaneknapp/spark,chuckchen/spark,xuanyuanking/spark,zzcclp/spark,nchammas/spark,taroplus/spark,zero323/spark,rednaxelafx/apache-spark,hvanhovell/spark,hvanhovell/spark,xuanyuanking/spark,shaneknapp/spark,ueshin/apache-spark,jiangxb1987/spark,holdenk/spark,chuckchen/spark,mahak/spark,gengliangwang/spark,witgo/spark,rednaxelafx/apache-spark,apache/spark,zzcclp/spark,milliman/spark,wangyum/spark,wangyum/spark,taroplus/spark,mahak/spark,wangyum/spark,mahak/spark,ueshin/apache-spark,vinodkc/spark,gengliangwang/spark,dongjoon-hyun/spark,BryanCutler/spark,mahak/spark,zzcclp/spark,taroplus/spark,wangmiao1981/spark,jiangxb1987/spark,shaneknapp/spark,jiangxb1987/spark,gengliangwang/spark,apache/spark,milliman/spark,BryanCutler/spark,srowen/spark,ueshin/apache-spark,gengliangwang/spark,BryanCutler/spark,xuanyuanking/spark,chuckchen/spark,witgo/spark,nchammas/spark,maropu/spark,WeichenXu123/spark,JoshRosen/spark,wangmiao1981/spark,holdenk/spark,hvanhovell/spark,zero323/spark,taroplus/spark,hvanhovell/spark,chuckchen/spark,cloud-fan/spark,wangyum/spark,milliman/spark,srowen/spark,BryanCutler/spark,ueshin/apache-spark,jiangxb1987/spark,rednaxelafx/apache-spark,HyukjinKwon/spark,apache/spark,wangyum/spark,WeichenXu123/spark,vinodkc/spark,dongjoon-hyun/spark,HyukjinKwon/spark,srowen/spark,rednaxelafx/apache-spark,nchammas/spark,shaneknapp/spark,mahak/spark,xuanyuanking/spark,HyukjinKwon/spark,nchammas/spark,cloud-fan/spark,chuckchen/spark,HyukjinKwon/spark,hvanhovell/spark,wangmiao1981/spark,zzcclp/spark,hvanhovell/spark,cloud-fan/spark,jiangxb1987/spark,milliman/spark,gengliangwang/spark,vinodkc/spark,nchammas/spark,maropu/spark,rednaxelafx/apache-spark,nchammas/spark,milliman/spark,mahak/spark,maropu/spark,srowen/spark,zero323/spark,dongjoon-hyun/spark,xuanyuanking/spark,vinodkc/spark,WeichenXu123/spark,HyukjinKwon/spark,wangmiao1981/spark,jiangxb1987/spark,witgo/spark