fix(docs): outdated class names

[hkford]

Solve this issue

Tracing with ADOT Python SDK and X-Ray documentation uses some old classes.

Sending Traces to AWS X-Ray should be like the following because BatchExportSpanProcessor is renamed to BatchSpanProcessor at this PR and AwsXRayIdsGenerator is renamed to AwsXRayIdGenerator at this PR.

from opentelemetry.sdk.trace.export import BatchSpanProcessor
from opentelemetry.sdk.extension.aws.trace import AwsXRayIdGenerator
# Sends generated traces in the OTLP format to an ADOT Collector running on port 4317
otlp_exporter = OTLPSpanExporter(endpoint="http://localhost:4317")
# Processes traces in batches as opposed to immediately one after the other
span_processor = BatchSpanProcessor(otlp_exporter)
# Configures the Global Tracer Provider
trace.set_tracer_provider(TracerProvider(active_span_processor=span_processor, ids_generator=AwsXRayIdGenerator()))