implement events v1.32 (#1291)

* implement events v1.32
implement the events api + sdk per spec v1.32:
- event logger is now only retrievable via an event logger provider
- domain attribute for events is removed
- events accept a subset of logrecord params, rather than an entire logrecord

* convert severity to a backed enum

* lint

* remove instead of deprecating logEvent, mark Logger constructor as internal

* make severity an enum only

* event attributes to iterable

* inject ClockInterface, add CachedInstrumentation, update examples

* set correct defaults for events

* test coverage

* Revert "make severity an enum only"

This reverts commit 710822907bbc41d1ddcb2c19aa78222f59bde3aa.
Also, move PSR-3 mapping into the Severity enum.

* event attributes to iterable

* apply review feedback

ComponentProvider/OpenTelemetrySdk.php

@@ -14,6 +14,7 @@
 use OpenTelemetry\Context\Propagation\TextMapPropagatorInterface;
 use OpenTelemetry\SDK\Common\Attribute\Attributes;
 use OpenTelemetry\SDK\Common\Instrumentation\InstrumentationScopeFactory;
+use OpenTelemetry\SDK\Logs\EventLoggerProvider;
 use OpenTelemetry\SDK\Logs\LoggerProvider;
 use OpenTelemetry\SDK\Logs\LogRecordProcessorInterface;
 use OpenTelemetry\SDK\Logs\Processor\MultiLogRecordProcessor;
@@ -239,12 +240,14 @@ public function createPlugin(array $properties, Context $context): SdkBuilder
             instrumentationScopeFactory: new InstrumentationScopeFactory(Attributes::factory()),
             resource: $resource,
         );
+        $eventLoggerProvider = new EventLoggerProvider($loggerProvider);
 
         // </editor-fold>
 
         $sdkBuilder->setTracerProvider($tracerProvider);
         $sdkBuilder->setMeterProvider($meterProvider);
         $sdkBuilder->setLoggerProvider($loggerProvider);
+        $sdkBuilder->setEventLoggerProvider($eventLoggerProvider);
 
         return $sdkBuilder;
     }