metrics: add alert rule for process restart (#19154)
metrics: add alert rule for process restart (#19154)


EvilMcJerkface/tidb,pingcap/tidb,ngaut/tidb,ngaut/tidb,c4pt0r/tidb,kyle-wang/tidb,EvilMcJerkface/tidb,pingcap/tidb,kyle-wang/tidb,ngaut/tidb,c4pt0r/tidb,coocood/tidb,c4pt0r/tidb,coocood/tidb,ngaut/tidb,XuHuaiyu/tidb,kyle-wang/tidb,XuHuaiyu/tidb,pingcap/tidb,c4pt0r/tidb,ngaut/tidb,kyle-wang/tidb,pingcap/tidb,kyle-wang/tidb,ngaut/tidb,pingcap/tidb,c4pt0r/tidb,c4pt0r/tidb,pingcap/tidb,kyle-wang/tidb