feat: Qdrant inline provider (#1273)

# What does this PR do?
Removed local execution option from the remote Qdrant provider and
introduced an explicit inline provider for the embedded execution.
Updated the ollama template to include this option: this part can be
reverted in case we don't want to have two default `vector_io`
providers.

(Closes #1082)

## Test Plan
Build and run an ollama distro:
```bash
llama stack build --template ollama --image-type conda
llama stack run --image-type conda ollama
```

Run one of the sample ingestionapplicatinos like
[rag_with_vector_db.py](https://github.com/meta-llama/llama-stack-apps/blob/main/examples/agents/rag_with_vector_db.py),
but replace this line:
```py
    selected_vector_provider = vector_providers[0]
```
with the following, to use the `qdrant` provider:
```py
    selected_vector_provider = vector_providers[1]
```

After running the test code, verify the timestamp of the Qdrant store:
```bash
% ls -ltr ~/.llama/distributions/ollama/qdrant.db/collection/test_vector_db_*
total 784
-rw-r--r--@ 1 dmartino  staff  401408 Feb 26 10:07 storage.sqlite
```

[//]: # (## Documentation)

---------

Signed-off-by: Daniele Martinoli <dmartino@redhat.com>
Co-authored-by: Francisco Arceo <farceo@redhat.com>

tests/unit/providers/vector_io/test_sqlite_vec.py

@@ -29,8 +29,6 @@ from llama_stack.providers.inline.vector_io.sqlite_vec.sqlite_vec import (
 # -v -s --tb=short --disable-warnings --asyncio-mode=auto
 
 SQLITE_VEC_PROVIDER = "sqlite_vec"
-EMBEDDING_DIMENSION = 384
-EMBEDDING_MODEL = "all-MiniLM-L6-v2"
 
 
 @pytest.fixture(scope="session")
@@ -50,26 +48,8 @@ def sqlite_connection(loop):
 
 
 @pytest_asyncio.fixture(scope="session", autouse=True)
-async def sqlite_vec_index(sqlite_connection):
-    return await SQLiteVecIndex.create(dimension=EMBEDDING_DIMENSION, connection=sqlite_connection, bank_id="test_bank")
-
-
-@pytest.fixture(scope="session")
-def sample_chunks():
-    """Generates chunks that force multiple batches for a single document to expose ID conflicts."""
-    n, k = 10, 3
-    sample = [
-        Chunk(content=f"Sentence {i} from document {j}", metadata={"document_id": f"document-{j}"})
-        for j in range(k)
-        for i in range(n)
-    ]
-    return sample
-
-
-@pytest.fixture(scope="session")
-def sample_embeddings(sample_chunks):
-    np.random.seed(42)
-    return np.array([np.random.rand(EMBEDDING_DIMENSION).astype(np.float32) for _ in sample_chunks])
+async def sqlite_vec_index(sqlite_connection, embedding_dimension):
+    return await SQLiteVecIndex.create(dimension=embedding_dimension, connection=sqlite_connection, bank_id="test_bank")
 
 
 @pytest.mark.asyncio
@@ -82,21 +62,21 @@ async def test_add_chunks(sqlite_vec_index, sample_chunks, sample_embeddings):
 
 
 @pytest.mark.asyncio
-async def test_query_chunks(sqlite_vec_index, sample_chunks, sample_embeddings):
+async def test_query_chunks(sqlite_vec_index, sample_chunks, sample_embeddings, embedding_dimension):
     await sqlite_vec_index.add_chunks(sample_chunks, sample_embeddings)
-    query_embedding = np.random.rand(EMBEDDING_DIMENSION).astype(np.float32)
+    query_embedding = np.random.rand(embedding_dimension).astype(np.float32)
     response = await sqlite_vec_index.query(query_embedding, k=2, score_threshold=0.0)
     assert isinstance(response, QueryChunksResponse)
     assert len(response.chunks) == 2
 
 
 @pytest.mark.asyncio
-async def test_chunk_id_conflict(sqlite_vec_index, sample_chunks):
+async def test_chunk_id_conflict(sqlite_vec_index, sample_chunks, embedding_dimension):
     """Test that chunk IDs do not conflict across batches when inserting chunks."""
     # Reduce batch size to force multiple batches for same document
     # since there are 10 chunks per document and batch size is 2
     batch_size = 2
-    sample_embeddings = np.random.rand(len(sample_chunks), EMBEDDING_DIMENSION).astype(np.float32)
+    sample_embeddings = np.random.rand(len(sample_chunks), embedding_dimension).astype(np.float32)
 
     await sqlite_vec_index.add_chunks(sample_chunks, sample_embeddings, batch_size=batch_size)