Remove Moq from ResourceDetectors.AWS.Tests

[ngruson]

Related to #1467

Remove the Moq library from the ResourceDetectors.AWS.Tests project.

Changes

• Updated unit tests
• Removed Moq dependency

[codecov]

Codecov Report

Merging #1483 (8c89b1d) into main (71655ce) will increase coverage by 7.19%.
Report is 88 commits behind head on main.
The diff coverage is 90.32%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1483      +/-   ##
==========================================
+ Coverage   73.91%   81.10%   +7.19%     
==========================================
  Files         267      124     -143     
  Lines        9615     3451    -6164     
==========================================
- Hits         7107     2799    -4308     
+ Misses       2508      652    -1856     

Flag	Coverage Δ
unittests-Solution	81.10% <90.32%> (?)

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

Files	Coverage Δ
...Telemetry.Exporter.InfluxDB/InfluxDBEventSource.cs	60.00% <ø> (ø)
...ry.Exporter.InfluxDB/InfluxDBExporterExtensions.cs	100.00% <100.00%> (ø)
...metry.Exporter.InfluxDB/InfluxDBMetricsExporter.cs	84.61% <ø> (-3.85%)	⬇️
...Telemetry.Exporter.InfluxDB/PointDataExtensions.cs	87.50% <ø> (ø)
...ry.Exporter.InfluxDB/TelegrafPrometheusWriterV1.cs	100.00% <ø> (ø)
...ry.Exporter.InfluxDB/TelegrafPrometheusWriterV2.cs	100.00% <ø> (ø)
...stana/Implementation/InstanaExporterEventSource.cs	0.00% <ø> (ø)
...try.Exporter.Instana/Implementation/InstanaSpan.cs	100.00% <ø> (ø)
...orter.Instana/Implementation/InstanaSpanFactory.cs	100.00% <ø> (ø)
...er.Instana/Implementation/InstanaSpanSerializer.cs	93.79% <ø> (ø)
... and 48 more

... and 208 files with indirect coverage changes