Internal Load Balancer and Colab notebook implementation for vector databases

[BRV158]

Description

This PR contains all required manifests and changes to notebook files according to modified documents :
Elasticsearch
https://docs.google.com/document/d/14hFWOnkQCPEdUOsaT42o8IA1QYQtSB7xwDCfnVCB6ek/edit?usp=sharing
PGVector
https://docs.google.com/document/d/1LtEK8fON8Nni4rGezuXxKHZxgieLvx4wLO02DQvEJG0/edit?usp=sharing
Qdrant
https://docs.google.com/document/d/1sjeSJpJR2uNd6gyTIdgk-FfagCwZmNe5JIk_2Lu7HtM/edit?usp=sharing

[snippet-bot]

Here is the summary of changes.

You are about to add 3 region tags.

• databases/elasticsearch/manifests/02-elasticsearch/ilb.yaml:15, tag gke_databases_elasticsearch_02_elasticsearch_ilb
• databases/postgres-pgvector/manifests/01-basic-cluster/pgvector_ilb.yaml:15, tag gke_databases_pgvector_01_basic_cluster_pg_ilb
• databases/qdrant/manifests/02-values-file/ilb.yaml:15, tag gke_databases_qdrant_02_values_file_qdrant_ilb

You are about to delete 2 region tags.

• databases/postgres-pgvector/manifests/02-notebook/jupyter.yaml:15, tag gke_databases_postgres_pgvector_02_notebook
• databases/qdrant/manifests/04-notebook/jupyter.yaml:15, tag gke_databases_qdrant_04_notebook

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[bourgeoisor]

LGTM