Stabilize optional Exception parameter to Logger Emit (#4886)

Fixes #4858

Implementations / Prototypes:

- Java:
[`ExtendedLogRecordBuilder.setException(Throwable)`](https://github.com/open-telemetry/opentelemetry-java/blob/main/api/incubator/src/main/java/io/opentelemetry/api/incubator/logs/ExtendedLogRecordBuilder.java#L137)
- Builder method called before `emit()`
  - Merged and available to users
- .NET:
[`LogRecordAttributeList.RecordException(Exception)`](https://github.com/open-telemetry/opentelemetry-dotnet/blob/main/src/OpenTelemetry.Api/Logs/LogRecordAttributeList.cs#L191-L198)
- Attribute list method called before `EmitLog()`
- JavaScript:
[opentelemetry-js#6385](open-telemetry/opentelemetry-js#6385)
- Field on LogRecord passed to `emit()`
- Python:
[opentelemetry-python#4908](open-telemetry/opentelemetry-python#4908)
- Parameter on LogRecord passed to `emit()`

(only the Python prototype doesn't yet meet the definition of
[qualifying
prototype](https://github.com/open-telemetry/opentelemetry-specification/blob/main/CONTRIBUTING.md#proposing-a-change)
yet)

Co-authored-by: Robert Pająk <pellared@hotmail.com>

Author: trask

CHANGELOG.md

@@ -15,6 +15,9 @@ release.
 
 ### Logs
 
+- Stabilize optional `Exception` parameter to Logger Emit.
+  ([#4858](https://github.com/open-telemetry/opentelemetry-specification/pull/4858))
+
 ### Baggage
 
 ### Profiles

specification/logs/api.md

@@ -126,7 +126,7 @@ The API MUST accept the following parameters:
 - [Attributes](./data-model.md#field-attributes) (optional)
 - [Event Name](./data-model.md#field-eventname) (optional)
 
-**Status**: [Development](../document-status.md) - The API MAY accept the following parameter:
+The API MAY accept the following parameter:
 
 - Exception (optional): An exception (or error) associated with the log record.
 

specification/logs/sdk.md

@@ -225,8 +225,7 @@ However, the changes MUST be eventually visible.
 If [Observed Timestamp](./data-model.md#field-observedtimestamp) is unspecified,
 the implementation SHOULD set it equal to the current time.
 
-**Status**: [Development](../document-status.md) - If an
-[Exception](api.md#emit-a-logrecord) is provided, the SDK MUST by default set attributes
+If an [Exception](api.md#emit-a-logrecord) is provided, the SDK MUST by default set attributes
 from the exception on the `LogRecord` with the conventions outlined in the
 [exception semantic conventions](https://github.com/open-telemetry/semantic-conventions/blob/main/docs/exceptions/exceptions-logs.md).
 User-provided attributes MUST take precedence and MUST NOT be overwritten by