Introduce an observability crate using opentelemetry-rust (#2535)

* feat: add observability crate

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* fix: fix crate name

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* feat: add module files

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* feat: create config

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* fix: implement from trait

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* feat: add tracer and meter macro

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* feat: add license

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* fix: use full module path

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* fix: add shutdown method

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* feat: add build method to crate tracer provider and meter provider

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* fix: module path

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* fix: add export timeout duration and comment

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* feat: update interface

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* feat: add endpint configuration to root configuration

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* fix: update deps

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* fix: small refactor

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

* fix: deleted build method to create trace and metrics provider

Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>

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Signed-off-by: hlts2 <hiroto.funakoshi.hiroto@gmail.com>