### 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
doc.add(new StoredField("sf1", randomAlphaOfLength(5)));
                }
                if (ratio <= 0.67) {
                    doc.add(new StoredField("sf2", randomAlphaOfLength(5)));
                }
                doc.add(new StoredField("sf3", randomAlphaOfLength(5)));
            });
            final IndexDiskUsageStats stats = IndexDiskUsageAnalyzer.analyze(testShardId(), lastCommit(dir), () -> {});
            final IndexDiskUsageStats perField = collectPerFieldStats(dir);
            assertFieldStats(
                "total",
                "stored field",
                stats.total().getStoredFieldBytes(),
                perField.total().getStoredFieldBytes(),
                0.01,
                1024
            );
            assertFieldStats(
                "sf1",
                "stored field",
                stats.getFields().get("sf1").getStoredFieldBytes(),
                stats.total().getStoredFieldBytes() / 6,
                0.01,
                512
            );
            assertFieldStats(
                "sf2",
                "stored field",
                stats.getFields().get("sf2").getStoredFieldBytes(),
                stats.total().getStoredFieldBytes() / 3,