Revert "chore(writer): enable native writer by default"

[VianneyRuhlmann]

Reverts #14952

[github-actions]

CODEOWNERS have been resolved as:

.gitlab/benchmarks/bp-runner.microbenchmarks.fail-on-breach.yml         @DataDog/python-guild @DataDog/apm-core-python
ddtrace/settings/_config.py                                             @DataDog/apm-core-python
tests/contrib/mcp/conftest.py                                           @DataDog/ml-observability
tests/integration/test_integration.py                                   @DataDog/apm-core-python
tests/telemetry/test_writer.py                                          @DataDog/apm-python

[github-actions]

Bootstrap import analysis

Comparison of import times between this PR and base.

Summary

The average import time from this PR is: 242 ± 3 ms.

The average import time from base is: 247 ± 3 ms.

The import time difference between this PR and base is: -4.8 ± 0.1 ms.

Import time breakdown

The following import paths have shrunk:

ddtrace.auto 2.269 ms (0.94%)

ddtrace.bootstrap.sitecustomize 1.493 ms (0.62%)

ddtrace.bootstrap.preload 1.493 ms (0.62%)

ddtrace.internal.remoteconfig.client 0.679 ms (0.28%)

ddtrace 0.776 ms (0.32%)

ddtrace.internal._unpatched 0.117 ms (0.05%)

subprocess 0.085 ms (0.03%)

contextlib 0.085 ms (0.03%)

json 0.032 ms (0.01%)

json.decoder 0.032 ms (0.01%)

re 0.032 ms (0.01%)

enum 0.032 ms (0.01%)

types 0.032 ms (0.01%)