Remove deprecated log name from text marshaler

[djaglowski]

LogRecord.Name has been deprecated, but there is still a reference to it in the logging exporter. This change removes the name from the logging exporter output.

[codecov]

Codecov Report

Merging #5172 (4517b9a) into main (95b976f) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #5172      +/-   ##
==========================================
+ Coverage   90.33%   90.37%   +0.03%     
==========================================
  Files         185      185              
  Lines       11000    10999       -1     
==========================================
+ Hits         9937     9940       +3     
+ Misses        837      834       -3     
+ Partials      226      225       -1     

Impacted Files	Coverage Δ
internal/otlptext/logs.go	100.00% <ø> (ø)
model/internal/common.go	95.06% <0.00%> (+0.75%)	⬆️

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