[CORE][DOC] Add event log conf.
[CORE][DOC] Add event log conf.

## What changes were proposed in this pull request?

Event Log Server has a total of five configuration parameters, and now the description of the other two configuration parameters on the doc, user-friendly access and use.

## How was this patch tested?

manual tests

Please review http://spark.apache.org/contributing.html before opening a pull request.

Author: guoxiaolong <guo.xiaolong1@zte.com.cn>

Closes #19242 from guoxiaolongzte/addEventLogConf.

holdenk/spark,ConeyLiu/spark,sahilTakiar/spark,ptkool/spark,WindCanDie/spark,tengpeng/spark,markhamstra/spark,jkbradley/spark,ericvandenbergfb/spark,spark-test/spark,wangmiao1981/spark,hvanhovell/spark,darionyaphet/spark,wzhfy/spark,ueshin/apache-spark,ioana-delaney/spark,debugger87/spark,nlalevee/spark,mdespriee/spark,cin/spark,chuckchen/spark,wangyum/spark,skonto/spark,jkbradley/spark,rednaxelafx/apache-spark,rikima/spark,ueshin/apache-spark,zuotingbing/spark,ptkool/spark,WindCanDie/spark,1haodian/spark,Aegeaner/spark,zhouyejoe/spark,cloud-fan/spark,aray/spark,milliman/spark,lvdongr/spark,eyalfa/spark,actuaryzhang/spark,mahak/spark,adrian-ionescu/apache-spark,zzcclp/spark,actuaryzhang/spark,dongjoon-hyun/spark,witgo/spark,hvanhovell/spark,zzcclp/spark,gengliangwang/spark,michalsenkyr/spark,nchammas/spark,ioana-delaney/spark,rezasafi/spark,joseph-torres/spark,1haodian/spark,kiszk/spark,eyalfa/spark,lvdongr/spark,zuotingbing/spark,aray/spark,nchammas/spark,darionyaphet/spark,cin/spark,mdespriee/spark,ueshin/apache-spark,nchammas/spark,techaddict/spark,jkbradley/spark,dongjoon-hyun/spark,skonto/spark,brad-kaiser/spark,michalsenkyr/spark,zero323/spark,saltstar/spark,zero323/spark,nlalevee/spark,highfei2011/spark,zzcclp/spark,darionyaphet/spark,spark-test/spark,ConeyLiu/spark,lvdongr/spark,highfei2011/spark,bdrillard/spark,jiangxb1987/spark,taroplus/spark,rekhajoshm/spark,rikima/spark,icexelloss/spark,markhamstra/spark,aray/spark,spark-test/spark,holdenk/spark,yanboliang/spark,actuaryzhang/spark,esi-mineset/spark,brad-kaiser/spark,shaneknapp/spark,sureshthalamati/spark,witgo/spark,rekhajoshm/spark,chuckchen/spark,saltstar/spark,hhbyyh/spark,kevinyu98/spark,kevinyu98/spark,wzhfy/spark,wangyum/spark,JoshRosen/spark,ericvandenbergfb/spark,szhem/spark,pgandhi999/spark,gengliangwang/spark,wzhfy/spark,markhamstra/spark,skonto/spark,saltstar/spark,dbtsai/spark,JoshRosen/spark,highfei2011/spark,apache/spark,facaiy/spark,pgandhi999/spark,srowen/spark,mahak/spark,BryanCutler/spark,akopich/spark,aray/spark,ueshin/apache-spark,facaiy/spark,JoshRosen/spark,kiszk/spark,milliman/spark,zzcclp/spark,eyalfa/spark,zuotingbing/spark,actuaryzhang/spark,skonto/spark,bravo-zhang/spark,caneGuy/spark,chuckchen/spark,wangmiao1981/spark,vinodkc/spark,cloud-fan/spark,ddna1021/spark,vinodkc/spark,lxsmnv/spark,rezasafi/spark,srowen/spark,taroplus/spark,bdrillard/spark,tejasapatil/spark,shaneknapp/spark,akopich/spark,tengpeng/spark,hvanhovell/spark,lxsmnv/spark,dbtsai/spark,shaneknapp/spark,cin/spark,bravo-zhang/spark,actuaryzhang/spark,jiangxb1987/spark,facaiy/spark,WindCanDie/spark,rednaxelafx/apache-spark,joseph-torres/spark,ericvandenbergfb/spark,ahnqirage/spark,facaiy/spark,icexelloss/spark,joseph-torres/spark,HyukjinKwon/spark,hvanhovell/spark,wangyum/spark,darionyaphet/spark,aosagie/spark,cloud-fan/spark,sureshthalamati/spark,eyalfa/spark,mahak/spark,ueshin/apache-spark,ptkool/spark,xuanyuanking/spark,Aegeaner/spark,ericvandenbergfb/spark,aray/spark,akopich/spark,darionyaphet/spark,HyukjinKwon/spark,techaddict/spark,tejasapatil/spark,jiangxb1987/spark,ahnqirage/spark,dbtsai/spark,maropu/spark,holdenk/spark,szhem/spark,akopich/spark,ahnqirage/spark,vinodkc/spark,facaiy/spark,hvanhovell/spark,milliman/spark,WindCanDie/spark,techaddict/spark,jiangxb1987/spark,ioana-delaney/spark,darionyaphet/spark,dongjoon-hyun/spark,WeichenXu123/spark,zero323/spark,BryanCutler/spark,techaddict/spark,kevinyu98/spark,brad-kaiser/spark,WeichenXu123/spark,tengpeng/spark,wzhfy/spark,maropu/spark,adrian-ionescu/apache-spark,techaddict/spark,cloud-fan/spark,zero323/spark,jiangxb1987/spark,milliman/spark,zzcclp/spark,wangyum/spark,eyalfa/spark,joseph-torres/spark,ddna1021/spark,BryanCutler/spark,markhamstra/spark,LantaoJin/spark,guoxiaolongzte/spark,saltstar/spark,srowen/spark,ioana-delaney/spark,guoxiaolongzte/spark,tejasapatil/spark,facaiy/spark,goldmedal/spark,zero323/spark,ioana-delaney/spark,rekhajoshm/spark,ptkool/spark,aosagie/spark,wangyum/spark,shuangshuangwang/spark,aosagie/spark,cloud-fan/spark,joseph-torres/spark,witgo/spark,rezasafi/spark,michalsenkyr/spark,LantaoJin/spark,vinodkc/spark,caneGuy/spark,kevinyu98/spark,HyukjinKwon/spark,bravo-zhang/spark,rikima/spark,sureshthalamati/spark,WeichenXu123/spark,michalsenkyr/spark,ron8hu/spark,jiangxb1987/spark,tengpeng/spark,brad-kaiser/spark,gengliangwang/spark,rekhajoshm/spark,zero323/spark,zzcclp/spark,ericvandenbergfb/spark,ddna1021/spark,aosagie/spark,xuanyuanking/spark,xuanyuanking/spark,caneGuy/spark,rezasafi/spark,aray/spark,ConeyLiu/spark,markhamstra/spark,rikima/spark,tengpeng/spark,aosagie/spark,witgo/spark,pgandhi999/spark,nlalevee/spark,Aegeaner/spark,WeichenXu123/spark,nlalevee/spark,guoxiaolongzte/spark,1haodian/spark,shaneknapp/spark,witgo/spark,rednaxelafx/apache-spark,lxsmnv/spark,rekhajoshm/spark,sahilTakiar/spark,szhem/spark,highfei2011/spark,rednaxelafx/apache-spark,ddna1021/spark,hhbyyh/spark,mdespriee/spark,sureshthalamati/spark,saltstar/spark,wangmiao1981/spark,tejasapatil/spark,1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byyh/spark