Add type hints to opentelemetry-sdk and run as a part of tests

Much of opentelemetry-sdk code doesn't have type hints. It would be great to add type hints and run the tests similar to opentelemetry-api.

• exporter/opentelemetry-exporter-otlp-proto-common
• opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/init.py
• opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/_view_instrument_match.py
• opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/aggregation.py
• opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/exemplar/exemplar_reservoir.py
• opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/exponential_histogram/
• opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/export/
• opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/instrument.py
• opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/measurement_consumer.py
• opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/metric_reader_storage.py
• opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/point.py
• opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/view.py

In order to work on these please announce what are you going to tackle with a comment in this PR. In order to see the warnings to fix you need to include a path (for exporter/opentelemetry-exporter-otlp-proto-common) or remove a path (for the metrics) from the already excluded ones in pyright configuration in pyproject.toml. And make tox -e typecheck happy

Choose one unchecked path from the issue, such as a metrics module or exporter/opentelemetry-exporter-otlp-proto-common, and inspect its exclusion in pyproject.toml. Adjust the relevant exclusion to expose warnings, then run tox -e typecheck; done means the selected path has type hints and the typecheck passes.