Added sample for inspect GCS file, bigquery and datastore with SCC action

[dinesh-crest]

Description

References:- https://cloud.google.com/dlp/docs/sending-results-to-scc.md#bigquery-data
https://cloud.google.com/dlp/docs/sending-results-to-scc.md#cloud-storage-data
https://cloud.google.com/dlp/docs/sending-results-to-scc.md?g=0&l=416#datastore-data

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Checklist

• I have followed guidelines from CONTRIBUTING.MD and Samples Style Guide
• Tests pass: npm test (see Testing)
• Lint pass: npm run lint (see Style)
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• This pull request is from a branch created directly off of GoogleCloudPlatform/nodejs-docs-samples. Not a fork.
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new sample directory, and I created GitHub Actions workflow for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

[snippet-bot]

Here is the summary of changes.

You are about to add 3 region tags.

• dlp/inspectBigquerySendToScc.js:22, tag dlp_inspect_bigquery_send_to_scc
• dlp/inspectDatastoreSendToScc.js:22, tag dlp_inspect_datastore_send_to_scc
• dlp/inspectGcsSendToScc.js:22, tag dlp_inspect_gcs_send_to_scc

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