Unify Microsoft.Extensions.Options version to 8.0.0

[Kielek]

Fixes #1683.

Changes

Unify Microsoft.Extensions.Options version to 8.0.0.
This package version is used on OpenTelemetry package.

For significant contributions please make sure you have completed the following items:

• Appropriate CHANGELOG.md updated for non-trivial changes
• [ ] Design discussion issue #
• [ ] Changes in public API reviewed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.37%. Comparing base (71655ce) to head (8335d0d).
Report is 278 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1830      +/-   ##
==========================================
- Coverage   73.91%   70.37%   -3.54%     
==========================================
  Files         267      294      +27     
  Lines        9615    10829    +1214     
==========================================
+ Hits         7107     7621     +514     
- Misses       2508     3208     +700     

Flag	Coverage Δ
unittests-Exporter.InfluxDB	94.65% <ø> (?)
unittests-Exporter.Instana	68.22% <ø> (?)
unittests-Exporter.Stackdriver	75.73% <ø> (?)
unittests-Extensions	79.83% <ø> (?)
unittests-Extensions.AWS	77.24% <ø> (?)
unittests-Extensions.Enrichment	100.00% <ø> (?)
unittests-Instrumentation.AWS	80.30% <ø> (?)
unittests-Instrumentation.AWSLambda	87.96% <ø> (?)
unittests-Instrumentation.ElasticsearchClient	79.87% <ø> (?)

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

see 291 files with indirect coverage changes