.Net: Enable Weaviate integration tests (microsoft#8627)

### Motivation and Context

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Enabled Weaviate integration tests for Docker image v1.26.4.

### Contribution Checklist

<!-- Before submitting this PR, please make sure: -->

- [x] The code builds clean without any errors or warnings
- [x] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [x] All unit tests pass, and I have added new tests where possible
- [x] I didn't break anyone 😄

dotnet/src/IntegrationTests/Connectors/Memory/Weaviate/WeaviateVectorStoreFixture.cs

@@ -85,19 +85,20 @@ private static async Task<bool> CheckIfClusterReadyAsync(HttpClient httpClient)
     private static async Task<string> SetupWeaviateContainerAsync(DockerClient client)
     {
         const string Image = "cr.weaviate.io/semitechnologies/weaviate";
+        const string Tag = "1.26.4";
 
         await client.Images.CreateImageAsync(
             new ImagesCreateParameters
             {
                 FromImage = Image,
-                Tag = "latest",
+                Tag = Tag,
             },
             null,
             new Progress<JSONMessage>());
 
         var container = await client.Containers.CreateContainerAsync(new CreateContainerParameters()
         {
-            Image = Image,
+            Image = $"{Image}:{Tag}",
             HostConfig = new HostConfig()
             {
                 PortBindings = new Dictionary<string, IList<PortBinding>>

dotnet/src/IntegrationTests/Connectors/Memory/Weaviate/WeaviateVectorStoreRecordCollectionTests.cs

@@ -13,9 +13,7 @@ namespace SemanticKernel.IntegrationTests.Connectors.Memory.Weaviate;
 [Collection("WeaviateVectorStoreCollection")]
 public sealed class WeaviateVectorStoreRecordCollectionTests(WeaviateVectorStoreFixture fixture)
 {
-    private const string SkipReason = "Tests are disabled during batch/object request problem investigation.";
-
-    [Fact(Skip = SkipReason)]
+    [Fact]
     public async Task ItCanCreateCollectionAsync()
     {
         // Arrange
@@ -28,7 +26,7 @@ public async Task ItCanCreateCollectionAsync()
         Assert.True(await sut.CollectionExistsAsync());
     }
 
-    [Theory(Skip = SkipReason)]
+    [Theory]
     [InlineData("ExistingCollection", true)]
     [InlineData("NonExistentCollection", false)]
     public async Task ItCanCheckIfCollectionExistsAsync(string collectionName, bool collectionExists)
@@ -48,7 +46,7 @@ public async Task ItCanCheckIfCollectionExistsAsync(string collectionName, bool
         Assert.Equal(collectionExists, result);
     }
 
-    [Theory(Skip = SkipReason)]
+    [Theory]
     [InlineData("CollectionWithVectorAndDefinition", true, true)]
     [InlineData("CollectionWithVector", true, false)]
     [InlineData("CollectionWithDefinition", false, true)]
@@ -98,7 +96,7 @@ public async Task ItCanUpsertAndGetRecordAsync(string collectionName, bool inclu
         }
     }
 
-    [Fact(Skip = SkipReason)]
+    [Fact]
     public async Task ItCanDeleteCollectionAsync()
     {
         // Arrange
@@ -117,14 +115,16 @@ public async Task ItCanDeleteCollectionAsync()
         Assert.False(await sut.CollectionExistsAsync());
     }
 
-    [Fact(Skip = SkipReason)]
+    [Fact]
     public async Task ItCanDeleteRecordAsync()
     {
         // Arrange
         var hotelId = new Guid("55555555-5555-5555-5555-555555555555");
 
         var sut = new WeaviateVectorStoreRecordCollection<WeaviateHotel>(fixture.HttpClient!, "TestDeleteRecord");
 
+        await sut.CreateCollectionAsync();
+
         var record = this.CreateTestHotel(hotelId);
 
         var upsertResult = await sut.UpsertAsync(record);
@@ -142,7 +142,7 @@ public async Task ItCanDeleteRecordAsync()
         Assert.Null(getResult);
     }
 
-    [Fact(Skip = SkipReason)]
+    [Fact]
     public async Task ItCanUpsertAndGetAndDeleteBatchAsync()
     {
         // Arrange
@@ -176,7 +176,7 @@ public async Task ItCanUpsertAndGetAndDeleteBatchAsync()
         Assert.Empty(getResults);
     }
 
-    [Fact(Skip = SkipReason)]
+    [Fact]
     public async Task ItCanUpsertRecordAsync()
     {
         // Arrange