Revert "OnBoarding: Force full tracing without limits"

[raphaelgavache]

Reverts #3432 as its failing python injection tests, the syntax needs to be changed

raphael_gavache_datadoghq_com@raphael-debian12:~$ DD_APM_INSTRUMENTATION_DEBUG=true DD_TRACE_DEBUG=true DD_TRACE_SAMPLING_RULES=[{'sample_rate':1}]  python3
...
[2024-11-12 16:36:04] [ERROR] datadog.autoinstrumentation(pid: 943923): failed to load ddtrace module: cannot access local variable 'json_rules' where it is not associated with a value

raphael_gavache_datadoghq_com@raphael-debian12:~$ DD_APM_INSTRUMENTATION_DEBUG=true DD_TRACE_DEBUG=true DD_TRACE_SAMPLING_RULES="[{'sample_rate':1}]"  python3
...
[2024-11-12 16:36:04] [ERROR] datadog.autoinstrumentation(pid: 943923): failed to load ddtrace module: cannot access local variable 'json_rules' where it is not associated with a value