Update text embedding component

[PhilippeMoussalli]

PR that modifies the text embedding component:

• Change the name of the component to embed_text for consistency (we already have an embed_image component)
• Added VertexAI as a possible model to use
• Changed the base image to pytorch since some of the dependencies in the requirement have cuda deps
• Fixed some tests (mainly path related)

Tested the component with the CC rag pipeline and works fine (added the op here).

The component runs fine (exit code 0) however there seems to be an error that pops since the connection with the API does not seem to shutdown gracefully.

rag-cc-pipeline-embed_text-1     | [2023-10-18 13:58:45,227 | root | INFO] Writing data...
[########################################] | 100% Completed | 52.61 ss
rag-cc-pipeline-embed_text-1     | [2023-10-18 13:59:37,967 | fondant.executor | INFO] Saving output manifest to gs://soy-audio-379412_kfp-artifacts/custom_artifact/rag-cc-pipeline/rag-cc-pipeline-20231018155832/embed_text/manifest.json
rag-cc-pipeline-embed_text-1     | [2023-10-18 13:59:37,967 | fondant.executor | INFO] Writing cache key to gs://soy-audio-379412_kfp-artifacts/custom_artifact/rag-cc-pipeline/cache/dd3a24cb288cd0eaba12063d2885bc9d.txt
rag-cc-pipeline-embed_text-1     | Traceback (most recent call last):
rag-cc-pipeline-embed_text-1     |   File "src/python/grpcio/grpc/_cython/_cygrpc/aio/grpc_aio.pyx.pxi", line 110, in grpc._cython.cygrpc.shutdown_grpc_aio
rag-cc-pipeline-embed_text-1     |   File "src/python/grpcio/grpc/_cython/_cygrpc/aio/grpc_aio.pyx.pxi", line 114, in grpc._cython.cygrpc.shutdown_grpc_aio
rag-cc-pipeline-embed_text-1     |   File "src/python/grpcio/grpc/_cython/_cygrpc/aio/grpc_aio.pyx.pxi", line 78, in grpc._cython.cygrpc._actual_aio_shutdown
rag-cc-pipeline-embed_text-1     | AttributeError: 'NoneType' object has no attribute 'POLLER'
rag-cc-pipeline-embed_text-1     | Exception ignored in: 'grpc._cython.cygrpc.AioChannel.__dealloc__'
rag-cc-pipeline-embed_text-1     | Traceback (most recent call last):
rag-cc-pipeline-embed_text-1     |   File "src/python/grpcio/grpc/_cython/_cygrpc/aio/grpc_aio.pyx.pxi", line 110, in grpc._cython.cygrpc.shutdown_grpc_aio
rag-cc-pipeline-embed_text-1     |   File "src/python/grpcio/grpc/_cython/_cygrpc/aio/grpc_aio.pyx.pxi", line 114, in grpc._cython.cygrpc.shutdown_grpc_aio
rag-cc-pipeline-embed_text-1     |   File "src/python/grpcio/grpc/_cython/_cygrpc/aio/grpc_aio.pyx.pxi", line 78, in grpc._cython.cygrpc._actual_aio_shutdown
rag-cc-pipeline-embed_text-1     | AttributeError: 'NoneType' object has no attribute 'POLLER'

Normally this would be done with a client but in this case we're initializing the model directly

[RobbeSneyders]

Probably not ideal that we're loading an actual model (which makes the test dependent on an internet connection), although I don't mind as much in the component tests since we currently run them manually

[RobbeSneyders]

Let's look into suppressing the error later.