Adjust database span naming convention.

[lucas-zimerman]

• Operation names containing _ got replaced by . to align with the new SDK format.
• db.query_compiler got renamed to db.query.compile

Sub task from #1497

[codecov-commenter]

Codecov Report

Merging #1502 (0b9288d) into main (6ca55c0) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1502   +/-   ##
=======================================
  Coverage   84.23%   84.23%           
=======================================
  Files         219      219           
  Lines        7388     7388           
  Branches     1416     1416           
=======================================
  Hits         6223     6223           
  Misses        733      733           
  Partials      432      432           

Impacted Files	Coverage Δ
....EntityFramework/SentryQueryPerformanceListener.cs	86.36% <ø> (ø)
...Internals/DiagnosticSource/SentryEFCoreListener.cs	89.28% <100.00%> (ø)

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