.Net: Refactor: Relocate Weaviate Integration Test Files (#8290)

### Motivation and Context

Improved organization of Weaviate integration tests by relocating
related files.

### Description

Moved WeaviateMemoryStoreTests.cs and docker-compose.yml to
Memory/Weaviate for better structure and maintainability.

### Contribution Checklist

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

- [ ] The code builds clean without any errors or warnings
- [ ] 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
- [ ] All unit tests pass, and I have added new tests where possible
- [ ] I didn't break anyone 😄

Co-authored-by: Dmytro Struk <13853051+dmytrostruk@users.noreply.github.com>

dotnet/src/IntegrationTests/Connectors/Weaviate/WeaviateMemoryStoreTests.cs → dotnet/src/IntegrationTests/Connectors/Memory/Weaviate/WeaviateMemoryStoreTests.cs

@@ -9,7 +9,7 @@
 using Microsoft.SemanticKernel.Memory;
 using Xunit;
 
-namespace SemanticKernel.IntegrationTests.Connectors.Weaviate;
+namespace SemanticKernel.IntegrationTests.Connectors.Memory.Weaviate;
 
 /// <summary>
 /// Tests for <see cref="WeaviateMemoryStore" /> collection and upsert operations.
@@ -96,7 +96,7 @@ public async Task ItListsCollectionsAsync()
         await this._weaviateMemoryStore.CreateCollectionAsync(collectionName);
         Assert.True(await this._weaviateMemoryStore.DoesCollectionExistAsync(collectionName));
 
-        Assert.Single((await this._weaviateMemoryStore.GetCollectionsAsync().ToListAsync()));
+        Assert.Single(await this._weaviateMemoryStore.GetCollectionsAsync().ToListAsync());
 
         var collectionName2 = "SK" + Guid.NewGuid();
         await this._weaviateMemoryStore.CreateCollectionAsync(collectionName2);
@@ -110,17 +110,17 @@ public async Task ItDeletesCollectionAsync()
     {
         await this.DeleteAllClassesAsync();
 
-        Assert.Empty((await this._weaviateMemoryStore.GetCollectionsAsync().ToListAsync()));
+        Assert.Empty(await this._weaviateMemoryStore.GetCollectionsAsync().ToListAsync());
 
         var collectionName = "SK" + Guid.NewGuid();
         await this._weaviateMemoryStore.CreateCollectionAsync(collectionName);
         Assert.True(await this._weaviateMemoryStore.DoesCollectionExistAsync(collectionName));
 
-        Assert.Single((await this._weaviateMemoryStore.GetCollectionsAsync().ToListAsync()));
+        Assert.Single(await this._weaviateMemoryStore.GetCollectionsAsync().ToListAsync());
 
         await this._weaviateMemoryStore.DeleteCollectionAsync(collectionName);
         Assert.False(await this._weaviateMemoryStore.DoesCollectionExistAsync(collectionName));
-        Assert.Empty((await this._weaviateMemoryStore.GetCollectionsAsync().ToListAsync()));
+        Assert.Empty(await this._weaviateMemoryStore.GetCollectionsAsync().ToListAsync());
     }
 
     [Fact(Skip = SkipReason)]