Add core counting in factoryEntryStatusNow
This is a continuation of [#17825]
./creation/web_base/factoryEntryStatusNow.html was not changed, waiting for feedback from Factory ops because the structure and content of the page are confusing.
After discussing w/ Jeff:
- Total information block and client information block seem redundant, they are not really used by factory ops, is not clear why they have their structure, they could be removed
- Subtracting running from registered (Rundiff) should count the cores (running cores - registered cores). The glideins subtractions are not significant