[DOCS] Add page on BigQuery Delta Lake integration (#3123)

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#### Which Delta project/connector is this regarding?
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Please add the component selected below to the beginning of the pull
request title
For example: [Spark] Title of my pull request
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- [ ] Spark
- [ ] Standalone
- [ ] Flink
- [ ] Kernel
- [X] Other (fill in here)

## Description

Adds a page on BigQuery Delta Lake integration to the "integrations"
page.

Page is like this:
<img width="1726" alt="Screenshot 2024-05-20 at 6 15 42 PM"
src="https://github.com/delta-io/delta/assets/89107911/145e14d5-39b2-4737-b4f4-b6f4cea044ca">

And it is indexed as part of the integrations page here:
<img width="1728" alt="Screenshot 2024-05-20 at 6 15 57 PM"
src="https://github.com/delta-io/delta/assets/89107911/c0111cd4-5bd6-45b4-86b1-727e39402ae8">

## How was this patch tested?

Local build.

## Does this PR introduce _any_ user-facing changes?

No.

---------

Co-authored-by: Tathagata Das <[email protected]>
(cherry picked from commit 699df38)

Author: allisonport-db

docs/source/bigquery-integration.md

@@ -0,0 +1,9 @@
+---
+description: Learn how to read Delta Lake tables from Google BigQuery.
+---
+
+# Google BigQuery integration with <Delta>
+
+Google BigQuery supports reading <Delta> (reader version 3 with [Deletion Vectors](delta-deletion-vectors.md) and [Column Mapping](delta-column-mapping.md)). Please refer to [Delta Lake BigLake tables documentation](https://cloud.google.com/bigquery/docs/create-delta-lake-table) for more details.
+
+.. include:: /shared/replacements.md

docs/source/integrations.md

@@ -25,6 +25,7 @@ Since Athena [version 3](https://docs.aws.amazon.com/athena/latest/ug/engine-ver
     presto-integration
     redshift-spectrum-integration
     snowflake-integration
+    bigquery-integration
     hive-integration
     flink-integration
     delta-standalone