update otl and rand family deps

[congx4]

Description

cargo upgrade --incompatible
-p opentelemetry
-p opentelemetry_sdk
-p opentelemetry-otlp
-p tracing-opentelemetry
&& cargo check --all-targets

cargo upgrade --incompatible
-p rand
-p rand_distr
&& cargo check --all-targets && cargo test

How was this PR tested?

cargo check --all-targets && cargo test

make test-all

[guilload]

We need to call .shutdown on the processor in order to flush and send the in-flight spans. You will have to refactor setup_logging_and_tracing a little bit to do so.

[congx4]

Returned the trace_provider from setup_logging_and_tracing, so it can be shutdown from main.rs.

[guilload]

When can this fail now?

[congx4]

when I run cargo check --all-targets && cargo test in local, it is just warning:

warning: unused `Result` that must be used
   --> quickwit-proto/src/lib.rs:199:5
    |
199 |     Span::current().set_parent(parent_cx);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this `Result` may be an `Err` variant, which should be handled
    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
help: use `let _ = ...` to ignore the resulting value
    |
199 |     let _ = Span::current().set_parent(parent_cx);
    |     +++++++

But during CI phase, it shows as an error.