refactor(stackable-telemetry)!: Improve stackable-telemetry to make it easier to build the TraceGuard (#901)

* chore(stackable-telemetry): move tracing to a module directory

* feat(stackable-telemetry): Add a settings builder and implement it for console logging

* feat(stackable-telemetry): Add a settings builder for the otlp trace exporter

* feat(stackable-telemetry): Add a settings builder for the otlp log exporter

* chore(stackable-telemetry): Make settings available to the Tracing::init() function

* chore(stackable-telemetry): Introduce the CommonSettings trait for quicker access to common settings from subscriber specific settings

* refactor(stackable-telemetry): Rename env_var() for consistency, reorder fields

* chore(stackable-telemetry): Add SettingsDouble and SettingsTriple tuple and From impls as a config shortcut similar to before this PR

* chore(stackable-telemetry): Resolve clippy warnings

* refactor(stackable-telemetry): Prefix builder methods with `with_`.

I avoided prefixing `enabled()` because it sounds strange.

* refactor(stackable-telemetry): Revert SettingsDouble/SettingsTriple

Note: They will appear in a future PR

* docs(stackable-telemetry): Partially add docs

Note: More docs will appear in a future PR so that this PR isn't a blocker.

Tip: Enable `#![warn(missing_docs)]`

* refactor: Simplify From and Build trait usages

* refactor: Provide centralized default impls for CommonSettings trait

* docs: Fix doc tests

* docs: Fix doc comment references

* refactor: Use Deref instead of CommonSettings trait

* chore(stackable-telemetry): Apply suggestions from code review

Co-authored-by: Techassi <[email protected]>

* chore(stackable-telemetry): Update changelog

---------

Co-authored-by: Techassi <[email protected]>
Co-authored-by: Techassi <[email protected]>

Author: NickLarsenNZ

crates/stackable-telemetry/CHANGELOG.md

@@ -4,6 +4,17 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+### Added
+
+- Introduce common `Settings` and subscriber specific settings ([#901]).
+
+### Changed
+
+- BREAKING: Renamed `TracingBuilder` methods with long names, and prefix with `with_` ([#901]).
+- BREAKING: Use the new subscriber settings in the `TracingBuilder` ([#901]).
+
+[#901]: https://github.com/stackabletech/operator-rs/pull/901
+
 ## [0.2.0] - 2024-07-10
 
 ### Changed