Add update, fetch, and query integration tests (#51)

## Problem

The sdk currently lacks integration tests for updating, fetching, and
querying records.

## Solution

Added integration tests for sync and future stubs by: 
1. Upserting required + optional parameters vectors
2. Fetch to verify the vectors were upserted
3a. Update the values of the required param vector and query to verify
3b. Update the values and optional params of the required param vector
and query to verify
3c: Update the values and optional params of the optional param vector
and query to verify

Query by filter, id, vectors, and failing tests were also added.

## Type of Change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] This change requires a documentation update
- [ ] Infrastructure change (CI configs, etc)
- [ ] Non-code change (docs, etc)
- [X] None of the above: (explain here)
Integration tests

## Test Plan

Verified by running integration tests locally.

Author: rohanshah18

src/integration/java/io/pinecone/PineconeClientLiveIntegTest.java

@@ -120,7 +120,8 @@ public void sanity() throws Exception {
         fetchRequest = FetchRequest.newBuilder().addIds("v1").setNamespace(namespace).build();
         conn.getBlockingStub().fetch(fetchRequest);
 
-        // DEPRECATED: batch queries
+        // DEPRECATED: all methods related to queries in QueryVector
+        // Use methods related to Vector. Example: addVector, addAllVector, etc.
         float[] rawVector = {1.0F, 2.0F, 3.0F};
         QueryVector queryVector = QueryVector.newBuilder()
                 .addAllValues(Floats.asList(rawVector))
@@ -136,6 +137,8 @@ public void sanity() throws Exception {
                 .build();
 
         QueryRequest batchQueryRequest = QueryRequest.newBuilder()
+                // DEPRECATED: addQueries() and addAllQueries()
+                // Please use addVector() or addAllVector() instead
                 .addQueries(queryVector)
                 .setNamespace(namespace)
                 .setTopK(2)

src/integration/java/io/pinecone/helpers/BuildUpsertRequest.java

@@ -15,6 +15,8 @@
 public class BuildUpsertRequest {
     private static final float[][] upsertData = {{1.0F, 2.0F, 3.0F}, {4.0F, 5.0F, 6.0F}, {7.0F, 8.0F, 9.0F}};
     public static final String[] metadataFields = new String[]{"genre", "year"};
+    public static final List<Integer> sparseIndices = Arrays.asList(0, 1, 2);
+    public static final List<Float> sparseValues = Arrays.asList(0.11f, 0.22f, 0.33f);
     public static UpsertRequest buildRequiredUpsertRequest() {
         return buildRequiredUpsertRequest(new ArrayList<>(), "");
     }
@@ -24,6 +26,7 @@ public static UpsertRequest buildRequiredUpsertRequest(String namespace) {
     }
 
     public static UpsertRequest buildRequiredUpsertRequest(List<String> upsertIds, String namespace) {
+        // Namespace is not mandatory but added for each test, so they are independent
         if (upsertIds.isEmpty()) upsertIds = Arrays.asList("v1", "v2", "v3");
         if (namespace.isEmpty()) namespace = RandomStringBuilder.build("ns", 8);
 
@@ -59,8 +62,6 @@ public static UpsertRequest buildOptionalUpsertRequest(List<String> upsertIds, S
         if(metadataMap.isEmpty()) metadataMap = createAndGetMetadataMap();
 
         List<Vector> hybridVectors = new ArrayList<>();
-        List<Integer> sparseIndices = Arrays.asList(0, 1, 2);
-        List<Float> sparseValues = Arrays.asList(0.11f, 0.22f, 0.33f);
 
         for (int i = 0; i < upsertIds.size(); i++) {
             String field1 = metadataFields[i % metadataFields.length];