feat: add txredisapi integration

[Kyle-Verhoog]

Integration

This PR adds support for txredisapi.

Links

• Integration docs: https://github.com/IlyaSkriblovsky/txredisapi
• Corp docs PR:

Checklist

• [x] Usage and configuration documentation added in __init__.py, docs/index.rst and docs/integrations.rst.
• [ ] Corp docs PR to add new integration to documentation.
• [x] Span metadata
  • [x] Service (use int_service or ext_service).
  • [x] Span type should be one of these.
  • [x] Resource
• [x] Global configuration
  • [x] ddtrace.config entry is specified.
  • [x] Environment variables are provided for config options.
• [x] Instance configuration
  • [x] Pin overriding.
  • [x] Service name override (if applicable).
• [x] Async
  • [x] Span parenting behaves as expected.
  • [x] Context propagation across async contexts.
• [ ] ~HTTP~
  • [ ] ~Distributed tracing propagation is implemented.~
  • [ ] ~Use trace_utils.set_http_meta to set http tags~
• [ ] Tests
  • [ ] Tests are provided for all of the above.
  • [x] Tests are added to CI (.circleci/config.yml).
  • [x] Functionality is maintained from original library.
  • [ ] Patch test cases are added (see test_django_patch.py for an example).
  • [x] All Python versions that the library supports are tested.
  • [x] All significant library versions (including the latest) are tested. This typically includes every minor release going back a few years.

[mergify[bot]]

@Kyle-Verhoog this pull request is now in conflict 😩

[mergify[bot]]

@Kyle-Verhoog this pull request is now in conflict 😩