Test Common w/ multiple OTel versions & add compat with old OTel

[sentrivana]

With the switch to OTel, the Common test suite is now dependent on an otel package, so it technically fits the toxgen usecase. By letting toxgen take care of it, we're making sure we're always testing a good range of otel versions, including the oldest one (to catch regressions) and the newest one (to catch incompatibilities early).

Couple things surfaced in terms of incompatibility with older versions:

• Some semantic attributes we're using weren't there from the get go open-telemetry/opentelemetry-python@495d705. Changed the code that uses them to handle failure.
• The signature of span.set_status() changed at some point open-telemetry/opentelemetry-python@6e282d2. Added a compat version of set_status() for older otel.

Also included:

• removing the opentelemetry-experimental extra (not used anymore)
• ❗ switching to using opentelemetry-sdk instead of opentelemetry-distro -- the distro only seems to be setting up some defaults that we're not using

Closes #3241

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.34%. Comparing base (a7e24d9) to head (4ce2167).
Report is 1 commits behind head on potel-base.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@              Coverage Diff               @@
##           potel-base    #4312      +/-   ##
==============================================
- Coverage       84.35%   84.34%   -0.01%     
==============================================
  Files             144      144              
  Lines           14629    14636       +7     
  Branches         2325     2326       +1     
==============================================
+ Hits            12340    12345       +5     
  Misses           1561     1561              
- Partials          728      730       +2     

Files with missing lines	Coverage Δ
sentry_sdk/integrations/__init__.py	89.61% <ø> (ø)
sentry_sdk/opentelemetry/utils.py	82.15% <100.00%> (+0.22%)	⬆️
sentry_sdk/tracing.py	80.00% <100.00%> (+0.28%)	⬆️

... and 2 files with indirect coverage changes

[sentrivana]

This is unused now

[antonpirker]

one question. otherwise this look good.

[antonpirker]

moving this line is still necessary, even if we skip this test sometimes?

[sentrivana]

Moving this makes the test suite pass locally on 3.8, so it's still an improvement though not in CI