opentelemetry-sdk: add 'force_flush' method to LogRecordExporter ABC

[herin049]

Description

The OpenTelemetry SDK specification for logs documents the force flush operation, but this function is currently not required for log exporter implementation. This PR addresses this by adding force_flush to the LogRecordExporter ABC.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

uv run tox -e py314-test-opentelemetry-sdk

Does This PR Require a Contrib Repo Change?

• Yes. - Link to PR:
• No.

Checklist:

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[ocelotl]

Please review the type and value of the timeout, besides that, I am ready to approve ✌️ .

[ocelotl]

I'm not sure the type here should be a float. Also, we are using different values across the SDK:

tigre@sandokan:~/github/ocelotl/opentelemetry/opentelemetry-python/opentelemetry-sdk/src$ ack "def force_flush"
opentelemetry/sdk/_shared_internal/__init__.py
243:    def force_flush(self, timeout_millis: int | None = None) -> bool:

opentelemetry/sdk/trace/__init__.py
134:    def force_flush(self, timeout_millis: int = 30000) -> bool:  # pylint: disable=no-self-use
193:    def force_flush(self, timeout_millis: int = 30000) -> bool:
299:    def force_flush(self, timeout_millis: int = 30000) -> bool:
1458:    def force_flush(self, timeout_millis: int = 30000) -> bool:

opentelemetry/sdk/trace/export/__init__.py
85:    def force_flush(self, timeout_millis: int = 30000) -> bool:  # pyright: ignore[reportReturnType]
141:    def force_flush(self, timeout_millis: int = 30000) -> bool:
235:    def force_flush(self, timeout_millis: int | None = None) -> bool:
350:    def force_flush(self, timeout_millis: int = 30000) -> bool:

opentelemetry/sdk/trace/export/in_memory_span_exporter.py
51:    def force_flush(self, timeout_millis: int = 30000) -> bool:

opentelemetry/sdk/_events/__init__.py
92:    def force_flush(self, timeout_millis: int = 30000) -> bool:

opentelemetry/sdk/_logs/_internal/__init__.py
355:    def force_flush(self, timeout_millis: int = 30000) -> bool:
400:    def force_flush(self, timeout_millis: int = 30000) -> bool:
472:    def force_flush(self, timeout_millis: int = 30000) -> bool:
925:    def force_flush(self, timeout_millis: int = 30000) -> bool:

opentelemetry/sdk/_logs/_internal/export/in_memory_log_exporter.py
49:    def force_flush(self, timeout_millis: float = 10_000) -> bool:

opentelemetry/sdk/_logs/_internal/export/__init__.py
123:    def force_flush(self, timeout_millis: float = 10_000) -> bool:
172:    def force_flush(self, timeout_millis: float = 10_000) -> bool:
261:    def force_flush(self, timeout_millis: int = 30000) -> bool:  # pylint: disable=no-self-use
349:    def force_flush(self, timeout_millis: int | None = None) -> bool:

opentelemetry/sdk/metrics/_internal/__init__.py
559:    def force_flush(self, timeout_millis: float = 10_000) -> bool:

opentelemetry/sdk/metrics/_internal/export/__init__.py
122:    def force_flush(self, timeout_millis: float = 10_000) -> bool:
177:    def force_flush(self, timeout_millis: float = 10_000) -> bool:
403:    def force_flush(self, timeout_millis: float = 10_000) -> bool:
604:    def force_flush(self, timeout_millis: float = 10_000) -> bool: