ci: better Slack notifications for nightly jobs (#14985)
ci: better Slack notifications for nightly jobs (#14985)

 - do not report success from Eletron build jobs
 - report failures from more jobs
 - add separate summary jobs to report success
bpasero/electron,gerhardberger/electron,bpasero/electron,electron/electron,the-ress/electron,seanchas116/electron,gerhardberger/electron,electron/electron,the-ress/electron,gerhardberger/electron,the-ress/electron,the-ress/electron,seanchas116/electron,electron/electron,gerhardberger/electron,gerhardberger/electron,bpasero/electron,the-ress/electron,electron/electron,bpasero/electron,electron/electron,seanchas116/electron,gerhardberger/electron,electron/electron,seanchas116/electron,seanchas116/electron,the-ress/electron,seanchas116/electron,gerhardberger/electron,the-ress/electron,bpasero/electron,electron/electron,bpasero/electron,bpasero/electron