Handle None span context in the span processor and pin tokenizers version for anthropic tests on Python 3.8
#7871
| Job | Run time |
|---|---|
| 5m 9s | |
| 4m 51s | |
| 3m 30s | |
| 7m 20s | |
| 3m 16s | |
| 6m 40s | |
| 3m 43s | |
| 5m 8s | |
| 4m 9s | |
| 8m 3s | |
| 2s | |
| 51m 51s |