* Tracing: Pass OTLP address and propagation format to plugins
* Fix unit tests
* Fix indentation
* Fix plugin manager integration tests
* Goimports
* Pass plugin version to plugins
* Do not add GF_PLUGIN_VERSION if plugin version is not set, add tests
* Allow disabling plugins distributed tracing on a per-plugin basis
* Moved disabled plugins to tracing.opentelemetry config section
* Pre-allocate DisabledPlugins map to the correct size
* Moved disable tracing setting flags in plugin settings
* Renamed plugin env vars for tracing endpoint and propagation
* Fix plugin initializer tests
* Refactoring: Moved OpentelemetryCfg from pkg/infra to pkg/plugins
* Changed GetSection to Section in parseSettingsOpentelemetry
* Add tests for NewOpentelemetryCfg
* Fix test case names in TestNewOpentelemetryCfg
* OpenTelemetry: Remove redundant error checks
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