Give better error message on .edmplugincache file being missing

[makortel]

See https://codimd.web.cern.ch/s/ZvoynTER3 (from https://indico.cern.ch/event/1409519/#14-ibs-status-root-updates) . Presently the exception message is about missing plugin

----- Begin Fatal Exception 23-Apr-2024 16:29:32 CEST-----------------------
An exception of category 'PluginNotFound' occurred while
   [0] Initializing message logger
Exception Message:
Unable to find plugin 'SingleThreadMSPresence' because the category 'CMS EDM Framework Presence' has no known plugins
----- End Fatal Exception -------------------------------------------------

[makortel]

assign core

[cmsbuild]

New categories assigned: core

@Dr15Jones,@makortel,@smuzaffar you have been requested to review this Pull request/Issue and eventually sign? Thanks

[cmsbuild]

cms-bot internal usage

[cmsbuild]

A new Issue was created by @makortel.

@sextonkennedy, @makortel, @rappoccio, @smuzaffar, @antoniovilela, @Dr15Jones can you please review it and eventually sign/assign? Thanks.

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[makortel]

Also see #44821

[makortel]

@Dr15Jones Found out that in the case of #44821 there was one .edmplugincache in biglib, and that was empty. That is why the exception on "missing .edmplugincache" was not thrown.