Add ObservedTimestamp to pdata.LogRecord

[djaglowski]

Resolves #5170

[codecov]

Codecov Report

Merging #5171 (21eaf7a) into main (620c88c) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #5171      +/-   ##
==========================================
+ Coverage   90.33%   90.37%   +0.04%     
==========================================
  Files         185      185              
  Lines       11000    11006       +6     
==========================================
+ Hits         9937     9947      +10     
+ Misses        837      834       -3     
+ Partials      226      225       -1     

Impacted Files	Coverage Δ
internal/otlptext/logs.go	100.00% <100.00%> (ø)
model/internal/generated_log.go	96.71% <100.00%> (+0.06%)	⬆️
service/config_provider.go	94.33% <0.00%> (ø)
config/configmapprovider/properties.go
config/configmapprovider/expand.go
config/mapconverter/expandmapconverter/expand.go	100.00% <0.00%> (ø)
...rter/overwritepropertiesmapconverter/properties.go	100.00% <0.00%> (ø)
model/internal/common.go	95.06% <0.00%> (+0.75%)	⬆️

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