[Instrumentation.StackExchangeRedis] Adopt new database span attributes

[matt-hensley]

Fixes #
Design discussion issue #

Changes

Adopt new database span attributes for Redis driver.

Merge requirement checklist

• CONTRIBUTING guidelines followed (license requirements, nullable enabled, static analysis, etc.)
• Unit tests added/updated
• Appropriate CHANGELOG.md files updated for non-trivial changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.81%. Comparing base (af0d4b8) to head (6d4be95).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...mentation/RedisProfilerEntryToActivityConverter.cs	57.14%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3084      +/-   ##
==========================================
- Coverage   69.89%   69.81%   -0.09%     
==========================================
  Files         436      410      -26     
  Lines       16724    16268     -456     
==========================================
- Hits        11690    11357     -333     
+ Misses       5034     4911     -123     

Flag	Coverage Δ
unittests-Extensions.Enrichment.Http	?
unittests-Instrumentation.Cassandra	?
unittests-Instrumentation.StackExchangeRedis	71.80% <75.00%> (+1.48%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...dis/StackExchangeRedisConnectionInstrumentation.cs	95.83% <100.00%> (+0.24%)	⬆️
...eRedis/StackExchangeRedisInstrumentationOptions.cs	100.00% <100.00%> (ø)
...mentation/RedisProfilerEntryToActivityConverter.cs	43.75% <57.14%> (+2.57%)	⬆️

... and 49 files with indirect coverage changes

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