feat: add Bigtable documentation

Author: ad548

src/oss/python/integrations/providers/google.mdx

@@ -193,7 +193,7 @@ Load documents from various Google Cloud sources.
         Google Cloud BigQuery is a serverless data warehouse.
     </Card>
     <Card title="Bigtable" href="/oss/integrations/document_loaders/google_bigtable" cta="Get started" arrow>
-        Google Cloud Bigtable is a fully managed NoSQL Big Data database service.
+        Google Cloud Bigtable is a scalable, fully managed key-value and wide-column store ideal for fast access to structured, semi-structured, or unstructured data. 
     </Card>
     <Card title="Cloud SQL for MySQL" href="/oss/integrations/document_loaders/google_cloud_sql_mysql" cta="Get started" arrow>
         Google Cloud SQL for MySQL is a fully-managed MySQL database service.
@@ -225,9 +225,6 @@ Load documents from various Google Cloud sources.
     <Card title="Spanner" href="/oss/integrations/document_loaders/google_spanner" cta="Get started" arrow>
         Google Cloud Spanner is a fully managed, globally distributed relational database service.
     </Card>
-    <Card title="Bigtable" href="/oss/integrations/document_loaders/google_bigtable" cta="Get started" arrow>
-        Google Cloud Bigtable is a scalable, fully managed key-value and wide-column store ideal for fast access to structured, semi-structured, or unstructured data. 
-    </Card>
     <Card title="Speech-to-Text" href="/oss/integrations/document_loaders/google_speech_to_text" cta="Get started" arrow>
         Google Cloud Speech-to-Text transcribes audio files.
     </Card>