profiling: switch profile exporter to ureq

[realFlowControl]

Warning

This is vibe coded and I have not spend a second checking the code. I gave it a try in https://github.com/DataDog/dd-trace-php/tree/florian/ureq and it works, so thats something :-D

What does this PR do?

A brief description of the change being made with this pull request.

Motivation

Brings PHP Profiler binary size down by ~2.5 MB (from 16 to 13.3 on amd64 and from 14.5 to 12 on aarch64).

Additional Notes

Anything else we should know when reviewing?

How to test the change?

Describe here in detail how the change can be validated.

[datadog-prod-us1-5]

⚠️ Tests

✨ Fix all issues with BitsAI or with Cursor

⚠️ Warnings

🧪 2 Tests failed

test_export_agentless_named_pipe from libdd-profiling::exporter_e2e     (Fix with Cursor)

Error: named pipe E2E tests are not implemented without tokio

Error: named pipe E2E tests are not implemented without tokio

Stack backtrace:
   0: std::backtrace_rs::backtrace::win64::trace
             at /rustc/01f6ddf7588f42ae2d7eb0a2f21d44e8e96674cf/library\std\src\..\..\backtrace\src\backtrace\win64.rs:85
   1: std::backtrace_rs::backtrace::trace_unsynchronized
             at /rustc/01f6ddf7588f42ae2d7eb0a2f21d44e8e96674cf/library\std\src\..\..\backtrace\src\backtrace\mod.rs:66
   2: std::backtrace::Backtrace::create
...

test_export_agent_named_pipe from libdd-profiling::exporter_e2e     (Fix with Cursor)

Error: named pipe E2E tests are not implemented without tokio

Error: named pipe E2E tests are not implemented without tokio

Stack backtrace:
   0: std::backtrace_rs::backtrace::win64::trace
             at /rustc/01f6ddf7588f42ae2d7eb0a2f21d44e8e96674cf/library\std\src\..\..\backtrace\src\backtrace\win64.rs:85
   1: std::backtrace_rs::backtrace::trace_unsynchronized
             at /rustc/01f6ddf7588f42ae2d7eb0a2f21d44e8e96674cf/library\std\src\..\..\backtrace\src\backtrace\mod.rs:66
   2: std::backtrace::Backtrace::create
...

ℹ️ Info

No other issues found (see more)

❄️ No new flaky tests detected

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