### Description

It would be really great if [CircleProcessor.java](https://github.com/elastic/elasticsearch/blob/0699c9351f1439e246d408fd6538deafde4087b6/x-pack/plugin/spatial/src/main/java/org/elasticsearch/xpack/spatial/ingest/CircleProcessor.java) could be published in some maven artifact.
We are thinking to convert Geoshape Circle into Geoshape Polygon on application side instead of ElasticSearch Server side. The benefits of it is that it would make possible for us to choose `error_distance` dynamically depending on different conditions.
With direct code access to [CircleProcessor.java](https://github.com/elastic/elasticsearch/blob/0699c9351f1439e246d408fd6538deafde4087b6/x-pack/plugin/spatial/src/main/java/org/elasticsearch/xpack/spatial/ingest/CircleProcessor.java) and [SpatialUtils.java](https://github.com/elastic/elasticsearch/blob/0699c9351f1439e246d408fd6538deafde4087b6/x-pack/plugin/spatial/src/main/java/org/elasticsearch/xpack/spatial/SpatialUtils.java) it would be possible to make application side custom conversion logic.
ElasticSearch version: >= 8
x-pack/plugin/spatial/src/test/java/org/elasticsearch/xpack/spatial/ingest/CircleProcessorTests.java
null,
            null,
            Collections.emptyMap()
        );
        SearchExecutionContext mockedContext = mock(SearchExecutionContext.class);
        when(mockedContext.getFieldType(any())).thenReturn(shapeType);
        Query sameShapeQuery = shapeType.geoShapeQuery(mockedContext, fieldName, ShapeRelation.INTERSECTS, geometry);
        Query pointOnDatelineQuery = shapeType.geoShapeQuery(
            mockedContext,
            fieldName,
            ShapeRelation.INTERSECTS,
            new Point(180, circle.getLat())
        );
        try (Directory dir = newDirectory(); RandomIndexWriter w = new RandomIndexWriter(random(), dir)) {
            Document doc = new Document();
            GeoShapeIndexer indexer = new GeoShapeIndexer(Orientation.CCW, fieldName);
            for (IndexableField field : indexer.indexShape(geometry)) {
                doc.add(field);
            }
            w.addDocument(doc);
            try (IndexReader reader = w.getReader()) {
                IndexSearcher searcher = new IndexSearcher(reader);
                assertThat(searcher.search(sameShapeQuery, 1).totalHits.value, equalTo(1L));
                assertThat(searcher.search(pointOnDatelineQuery, 1).totalHits.value, equalTo(1L));
            }
        }
    }
    public void testShapeQuery() throws IOException {
        String fieldName = "circle";
        Circle circle = new Circle(0, 0, 10);