Fix for construct headers and queries when build request

[msyyc]

fixes #2670

[msyyc]

It is used for "construct headers and queries" so we had better update the function name with its usage scenario:

autorest.python/packages/typespec-python/generator/pygen/codegen/serializers/builder_serializer.py

Lines 469 to 498 in 3b89887

	def serialize_headers(self, builder: RequestBuilderType) -> List[str]:
	headers = [
	h
	for h in builder.parameters.headers
	if not builder.has_form_data_body or h.wire_name.lower() != "content-type"
	]
	retval = ["# Construct headers"] if headers else []
	for header in headers:
	retval.extend(
	self.parameter_serializer.serialize_query_header(
	header,
	"headers",
	self.serializer_name,
	self.code_model.is_legacy,
	)
	)
	return retval
	def serialize_query(self, builder: RequestBuilderType) -> List[str]:
	retval = ["# Construct parameters"]
	for parameter in builder.parameters.query:
	retval.extend(
	self.parameter_serializer.serialize_query_header(
	parameter,
	"params",
	self.serializer_name,
	self.code_model.is_legacy,
	)
	)
	return retval

[msyyc]

unused variable