SFI - ROPC: Clean up adonet files

[gewarren]

Contributes to #41954.

(Hide whitespace changes.)

• Removes connection strings where not needed.
• Adds note about using managed identities where appropriate.
• Delete ms.assetid metadata.
• Improves descriptions to placate Learn Linter.
• Fix headings by using sentence case and replacing gerunds.

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docs/framework/data/adonet/asynchronous-programming.md	docs/framework/data/adonet/asynchronous-programming
docs/framework/data/adonet/code-access-security.md	docs/framework/data/adonet/code-access-security
docs/framework/data/adonet/connection-string-builders.md	docs/framework/data/adonet/connection-string-builders
docs/framework/data/adonet/connection-string-syntax.md	docs/framework/data/adonet/connection-string-syntax
docs/framework/data/adonet/connection-strings-and-configuration-files.md	docs/framework/data/adonet/connection-strings-and-configuration-files
docs/framework/data/adonet/connection-strings.md	docs/framework/data/adonet/connection-strings
docs/framework/data/adonet/data-providers.md	docs/framework/data/adonet/data-providers
docs/framework/data/adonet/dataset-datatable-dataview/creating-a-datatable-from-a-dataview.md	docs/framework/data/adonet/dataset-datatable-dataview/creating-a-datatable-from-a-dataview
docs/framework/data/adonet/dataset-datatable-dataview/the-load-method.md	docs/framework/data/adonet/dataset-datatable-dataview/the-load-method
docs/framework/data/adonet/distributed-transactions.md	docs/framework/data/adonet/distributed-transactions
docs/framework/data/adonet/establishing-the-connection.md	docs/framework/data/adonet/establishing-the-connection
docs/framework/data/adonet/filling-a-dataset-using-one-or-more-ref-cursors.md	docs/framework/data/adonet/filling-a-dataset-using-one-or-more-ref-cursors
docs/framework/data/adonet/getschema-and-schema-collections.md	docs/framework/data/adonet/getschema-and-schema-collections
docs/framework/data/adonet/how-to-bind-a-dataview-object-to-a-winforms-datagridview-control.md	docs/framework/data/adonet/how-to-bind-a-dataview-object-to-a-winforms-datagridview-control
docs/framework/data/adonet/obtaining-a-dbproviderfactory.md	docs/framework/data/adonet/obtaining-a-dbproviderfactory
docs/framework/data/adonet/ole-db-odbc-and-oracle-connection-pooling.md	docs/framework/data/adonet/ole-db-odbc-and-oracle-connection-pooling
docs/framework/data/adonet/oracle-sequences.md	docs/framework/data/adonet/oracle-sequences
docs/framework/data/adonet/oracletypes.md	docs/framework/data/adonet/oracletypes
docs/framework/data/adonet/performance-counters.md	docs/framework/data/adonet/performance-counters
docs/framework/data/adonet/performing-batch-operations-using-dataadapters.md	docs/framework/data/adonet/performing-batch-operations-using-dataadapters
docs/framework/data/adonet/protecting-connection-information.md	docs/framework/data/adonet/protecting-connection-information
docs/framework/data/adonet/ref-cursor-parameters-in-an-oracledatareader.md	docs/framework/data/adonet/ref-cursor-parameters-in-an-oracledatareader
docs/framework/data/adonet/retrieving-data-from-multiple-ref-cursors.md	docs/framework/data/adonet/retrieving-data-from-multiple-ref-cursors
docs/framework/data/adonet/retrieving-identity-or-autonumber-values.md	docs/framework/data/adonet/retrieving-identity-or-autonumber-values
docs/framework/data/adonet/schema-restrictions.md	docs/framework/data/adonet/schema-restrictions
docs/framework/data/adonet/secure-data-access.md	docs/framework/data/adonet/secure-data-access
docs/framework/data/adonet/sql-server-connection-pooling.md	docs/framework/data/adonet/sql-server-connection-pooling
docs/framework/data/adonet/sqlclient-streaming-support.md	docs/framework/data/adonet/sqlclient-streaming-support
docs/framework/data/adonet/system-transactions-integration-with-sql-server.md	docs/framework/data/adonet/system-transactions-integration-with-sql-server
docs/framework/data/adonet/whats-new.md	docs/framework/data/adonet/whats-new

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[BillWagner]

This LGTM overall.

I found one typo in the code to fix before you merge it.