log: make remaining log level guards and the trace-agent RC path rule-aware

[pgimalac]

What does this PR do?

Remove various uses of log.GetLogLevel, in favor of ShouldLog or GetLogLevelSpec depending on how the level was used.

Motivation

GetLogLevel() only reports the default level, so with #57848 anything built on it ignores per-package rules.

Describe how you validated your changes

New tests for the /config/set endpoint (values stored as given, including an uppercase import path), the remote config spec flow (escaping, override removal) and the seclog level checks; dda inv test on all touched packages and the linter pass.

[datadog-datadog-prod-us1]

🎯 Code Coverage (details)
• Patch Coverage: 94.12%
• Overall Coverage: 62.79% (+0.00%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 20cb9c8 | Docs | Give us feedback!}

[dd-octo-sts]

Files inventory check summary

File checks results against ancestor 29b66769:

Results for datadog-agent_7.86.0~devel.git.315.20cb9c8.pipeline.143696952-1_amd64.deb:

No change detected

Results for datadog-iot-agent_7.86.0~devel.git.315.20cb9c8.pipeline.143696952-1_amd64.deb:

No change detected

[dd-octo-sts]

Static quality checks

✅ Please find below the results from static quality gates
Comparison made with ancestor 29b6676
📊 Static Quality Gates Dashboard
🔗 SQG Job

Successful checks

Info

	Quality gate	Change	Size (prev → curr → max)
✅	agent_deb_amd64	+195.34 KiB (0.03% increase, -3.62% of buffer)	755.256 → 755.447 → 760.520
✅	agent_deb_amd64_fips	+164.0 KiB (0.02% increase, -3.03% of buffer)	688.278 → 688.438 → 693.570
✅	agent_heroku_amd64	+43.34 KiB (0.01% increase, -6.77% of buffer)	319.145 → 319.187 → 319.770
✅	agent_msi	+203.5 KiB (0.03% increase, -55.46% of buffer)	653.832 → 654.030 → 654.190
✅	agent_rpm_amd64	+195.34 KiB (0.03% increase, -3.63% of buffer)	755.240 → 755.431 → 760.500
✅	agent_rpm_amd64_fips	+164.0 KiB (0.02% increase, -3.03% of buffer)	688.261 → 688.422 → 693.550
✅	agent_rpm_arm64	+147.33 KiB (0.02% increase, -2.71% of buffer)	725.785 → 725.929 → 731.100
✅	agent_rpm_arm64_fips	+143.64 KiB (0.02% increase, -2.61% of buffer)	664.371 → 664.512 → 669.740
✅	agent_suse_amd64	+195.34 KiB (0.03% increase, -3.63% of buffer)	755.240 → 755.431 → 760.500
✅	agent_suse_amd64_fips	+164.0 KiB (0.02% increase, -3.03% of buffer)	688.261 → 688.422 → 693.550
✅	agent_suse_arm64	+147.33 KiB (0.02% increase, -2.71% of buffer)	725.785 → 725.929 → 731.100
✅	agent_suse_arm64_fips	+143.64 KiB (0.02% increase, -2.61% of buffer)	664.371 → 664.512 → 669.740
✅	docker_agent_amd64	+171.34 KiB (0.02% increase, -3.16% of buffer)	811.423 → 811.591 → 816.720
✅	docker_agent_arm64	+147.32 KiB (0.02% increase, -2.67% of buffer)	806.591 → 806.735 → 811.970
✅	docker_agent_jmx_amd64	+171.34 KiB (0.02% increase, -3.16% of buffer)	1002.293 → 1002.460 → 1007.590
✅	docker_agent_jmx_arm64	+147.32 KiB (0.01% increase, -2.67% of buffer)	986.241 → 986.384 → 991.620
✅	docker_dogstatsd_amd64	+28.0 KiB (0.07% increase, -3.05% of buffer)	39.543 → 39.571 → 40.440
✅	docker_host_profiler_amd64	+34.71 KiB (0.01% increase, -4.72% of buffer)	308.722 → 308.756 → 309.440
✅	docker_host_profiler_arm64	+10.18 KiB (0.00% increase, -1.39% of buffer)	319.865 → 319.875 → 320.580
✅	dogstatsd_deb_amd64	+24.0 KiB (0.08% increase, -2.57% of buffer)	30.289 → 30.313 → 31.200
✅	dogstatsd_deb_arm64	+24.0 KiB (0.08% increase, -2.54% of buffer)	28.278 → 28.301 → 29.200
✅	dogstatsd_rpm_amd64	+24.0 KiB (0.08% increase, -2.57% of buffer)	30.289 → 30.313 → 31.200
✅	dogstatsd_suse_amd64	+24.0 KiB (0.08% increase, -2.57% of buffer)	30.289 → 30.313 → 31.200
✅	iot_agent_deb_amd64	+28.0 KiB (0.06% increase, -15.25% of buffer)	47.371 → 47.398 → 47.550
✅	iot_agent_deb_arm64	+24.0 KiB (0.05% increase, -6.13% of buffer)	43.837 → 43.861 → 44.220
✅	iot_agent_deb_armhf	+20.0 KiB (0.04% increase, -5.31% of buffer)	44.652 → 44.672 → 45.020
✅	iot_agent_rpm_amd64	+28.0 KiB (0.06% increase, -15.30% of buffer)	47.371 → 47.399 → 47.550
✅	iot_agent_suse_amd64	+28.0 KiB (0.06% increase, -15.21% of buffer)	47.370 → 47.398 → 47.550
✅	docker_cluster_agent_amd64	+24.0 KiB (0.01% increase, -0.72% of buffer)	211.196 → 211.220 → 214.450
✅	docker_cluster_agent_arm64	+64.0 KiB (0.03% increase, -1.92% of buffer)	224.162 → 224.224 → 227.410

3 successful checks with minimal change (< 2 KiB)

	Quality gate	Current Size
✅	docker_cws_instrumentation_amd64	7.443 MiB
✅	docker_cws_instrumentation_arm64	6.877 MiB
✅	docker_dogstatsd_arm64	37.629 MiB