Load resource stream over file

[prd-fox]

Fixes #732

Getting the file path of a resource was causing a FileSystemNotFound exception to be thrown, which happens when trying to access the Path of the included database schemas.
To fix this, we get a stream for the resource instead of using the file directly.

Add extra debug info that contains the exception type, which proved useful in debugging this scenario; more can be added as needed.

[codecov-io]

Codecov Report

Merging #733 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #733      +/-   ##
============================================
+ Coverage     99.44%   99.44%   +<.01%     
+ Complexity     1890     1886       -4     
============================================
  Files           285      285              
  Lines          5615     5620       +5     
  Branches        284      284              
============================================
+ Hits           5584     5589       +5     
  Misses            5        5              
  Partials         26       26

Impacted Files	Coverage Δ	Complexity Δ
...n/java/com/quorum/tessera/config/ServerConfig.java	100% <ø> (ø)	25 <0> (ø)	⬇️
...quorum/tessera/data/migration/CmdLineExecutor.java	100% <ø> (ø)	6 <0> (ø)	⬇️
...rum/tessera/data/migration/SqliteDataExporter.java	100% <100%> (ø)	4 <0> (-2)	⬇️
.../quorum/tessera/data/migration/H2DataExporter.java	100% <100%> (ø)	2 <0> (-2)	⬇️

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