Add some missing PNSEs

[buyaa-n]

Summary

Related to #1683 and dotnet/runtime#47228

Adding a few missing PNSEs for some CodeDom APIs not supported in .Net Core. This API might get supported in the future but for now, has no progress.

The RsaProtectedConfigurationProvider type is not supported on .Net Core and all APIs throws but it has an open PR which will not be merged into 6.0. For this type did not added PNSE for all APIs, instead added a note on the type

[opbld31]

Docs Build status updates of commit 4835c21:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.CodeDom.Compiler/CodeDomProvider.xml	✅Succeeded	View
xml/System.Configuration/RsaProtectedConfigurationProvider.xml	✅Succeeded	View
xml/System.Text.RegularExpressions/Regex.xml	✅Succeeded	View

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel

[opbld31]

Docs Build status updates of commit 7368e44:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.CodeDom.Compiler/CodeDomProvider.xml	✅Succeeded	View
xml/System.Configuration/RsaProtectedConfigurationProvider.xml	✅Succeeded	View
xml/System.Text.RegularExpressions/Regex.xml	✅Succeeded	View

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel

[jeffhandley]

Pending the guidance from @gewarren on the right phrase for ".NET Core and .NET 5" (and/or the posted suggestion applied to all locations), approved.

[opbld33]

Docs Build status updates of commit 7ac1375:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.CodeDom.Compiler/CodeDomProvider.xml	✅Succeeded	View
xml/System.Configuration/RsaProtectedConfigurationProvider.xml	✅Succeeded	View
xml/System.Text.RegularExpressions/Regex.xml	✅Succeeded	View

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel

[opbld30]

Docs Build status updates of commit 9e15c41:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.CodeDom.Compiler/CodeDomProvider.xml	✅Succeeded	View
xml/System.Configuration/RsaProtectedConfigurationProvider.xml	✅Succeeded	View
xml/System.Text.RegularExpressions/Regex.xml	✅Succeeded	View

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel

[buyaa-n]

Thanks for the review