Support dynamic configuration of tagged headers

[mcculls]

No description provided.

[pr-commenter]

Benchmarks

Parameters

	Baseline	Candidate
commit	1.14.0-SNAPSHOT~e41c7fc3bb	1.14.0-SNAPSHOT~460ac37355
config	baseline	candidate

See matching parameters

	Baseline	Candidate
module	Agent	Agent
parent	None	None

Summary

Found 0 performance improvements and 1 performance regressions! Performance is the same for 21 cases.

scenario	Δ mean execution_time
scenario:Startup-iast-Remote Config	worse [+9.246µs; +36.030µs] or [+1.536%; +5.988%]

See unchanged results

scenario	Δ mean execution_time
scenario:Startup-base-Agent	same
scenario:Startup-base-Agent.start	unsure [+0.536ms; +7.394ms] or [+0.056%; +0.779%]
scenario:Startup-base-BytebuddyAgent	same
scenario:Startup-base-GlobalTracer	unsure [+0.512ms; +2.551ms] or [+0.232%; +1.156%]
scenario:Startup-base-AppSec	same
scenario:Startup-base-Remote Config	same
scenario:Startup-base-Telemetry	same
scenario:Startup-iast-Agent	same
scenario:Startup-iast-Agent.start	same
scenario:Startup-iast-BytebuddyAgent	same
scenario:Startup-iast-GlobalTracer	same
scenario:Startup-iast-AppSec	same
scenario:Startup-iast-IAST	same
scenario:Startup-iast-Telemetry	same
scenario:Startup-waf-Agent	same
scenario:Startup-waf-Agent.start	same
scenario:Startup-waf-BytebuddyAgent	same
scenario:Startup-waf-GlobalTracer	same
scenario:Startup-waf-AppSec	same
scenario:Startup-waf-Remote Config	same
scenario:Startup-waf-Telemetry	same

[bantonsson]

Really nice cleanup, but I'm missing dynamic updates of the reverse baggage mapping in the injectors.

[mcculls]

Hi @bantonsson - I left out the inject side in this PR because it's not actually required for the first release of dynamic config. Baggage mapping isn't one of the items which will be exposed as editable, but it was easier to include it in TraceConfig than have the extractor code contain both old and new concepts. In other words we're not currently expecting baggage mapping to change over the life of the tracer, even though this PR unlocks that ability for the extract side.

I'll create a separate PR for the inject side for consistency, but I'd prefer not to have that block this PR.