Internal logging raw_error! macro support

[jmacd]

Part of #1771.

Part of #1736.

Follows #1741.

This raw_error! macro is different from the others in internal_events.rs in two ways:

1. Supports the complete Tokio tracing syntax, including display and debug formatters
2. Bypasses the Tokio global dispatch and subscriber, calling into the raw logging layer

The use of tracing's valueset! macro is key to supporting the whole syntax for the other otel_XXX! macros.

Test log statement prints:

2026-01-15T20:59:42.100Z  ERROR  otap_df_telemetry::internal_events::tests::raw error message (crates/telemetry/src/internal_events.rs:171):  [error=ConfigurationError("bad config")]

[codecov]

Codecov Report

❌ Patch coverage is 95.23810% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 84.34%. Comparing base (d7abcd3) to head (70c905c).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1796      +/-   ##
==========================================
+ Coverage   84.33%   84.34%   +0.01%     
==========================================
  Files         495      496       +1     
  Lines      144350   144363      +13     
==========================================
+ Hits       121740   121769      +29     
+ Misses      22076    22060      -16     
  Partials      534      534              

Components	Coverage Δ
otap-dataflow	85.61% <95.23%> (+0.01%)	⬆️
query_abstraction	80.61% <ø> (ø)
query_engine	90.52% <ø> (ø)
syslog_cef_receivers	∅ <ø> (∅)
otel-arrow-go	53.50% <ø> (ø)
quiver	89.81% <ø> (ø)

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[lquerel]

LGTM

[utpilla]

mod tests should be placed under #[cfg(test)].