### Description

We now support storing KNN vectors as part of our indexed data.  These vectors should be included in the disk usage API.
server/src/test/java/org/elasticsearch/action/admin/indices/diskusage/IndexDiskUsageAnalyzerTests.java
assertFieldStats(
                "total",
                "term vectors",
                stats.total().getTermVectorsBytes(),
                perField.total().getTermVectorsBytes(),
                0.01,
                1024
            );
            assertFieldStats(
                "v1",
                "term vectors",
                stats.getFields().get("v1").getTermVectorsBytes(),
                stats.total().getTermVectorsBytes() / 7,
                0.01,
                512
            );
            assertFieldStats(
                "v2",
                "term vectors",
                stats.getFields().get("v2").getTermVectorsBytes(),
                stats.total().getTermVectorsBytes() * 2 / 7,
                0.01,
                512
            );
            assertFieldStats(
                "v3",
                "term vectors",
                stats.getFields().get("v3").getTermVectorsBytes(),
                stats.total().getTermVectorsBytes() * 4 / 7,
                0.01,