feat: enable multiquery

[ariadnafer]

Description

Previous custom components was not allowing running multi-queries in the same SQL file. This PR merges all the queries into a single SQL script and replace the custom component with the BigqueryQueryJobOp google component

How has this been tested?

Please explain how you have tested the new changes.

Checklist

• I have commented my code, particularly in hard-to-understand areas
• I have successfully run the E2E tests, and have included the links to the pipeline runs below
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have updated any relevant documentation to reflect my changes
• I have assigned a reviewer and messaged them

Pipeline run links:

https://console.cloud.google.com/vertex-ai/locations/europe-west2/pipelines/runs/xgboost-train-pipeline-20230516134111?project=dt-turbo-templates-dev
https://console.cloud.google.com/vertex-ai/locations/europe-west2/pipelines/runs/xgboost-prediction-pipeline-20230516135109?project=dt-turbo-templates-dev
https://console.cloud.google.com/vertex-ai/locations/europe-west2/pipelines/runs/tensorflow-train-pipeline-20230516135752?project=dt-turbo-templates-dev
https://console.cloud.google.com/vertex-ai/locations/europe-west2/pipelines/runs/tensorflow-prediction-pipeline-20230516142755?project=dt-turbo-templates-dev

The base branch was changed.

[felix-datatonic]

/gcbrun

[ghost]

LGTM!