Add TAR tests that verify ExtractToFile works with special files

[carlossanlop]

We already have tests that verify:

• The creation of TarEntry instances for fifo, block & character device entry types.
• Reading them from an archive, verifying the correct values of DeviceMajor and DeviceMinor.
• Reading them from the filesystem and generating TarEntry instances, verifying the correct values of DeviceMajor and DeviceMinor.
• Writing them to an archive, and verifying the data was correctly written.
• Checking that an exception is thrown when the user is not a superuser in Unix when attempting to extract such entries.
• Checking they are unsupported entries on Windows.

But we don't yet have tests for successful extraction of such entries entry types to the file system.

Pending confirm that the exotic runtime-extra-platforms do not have weird behaviors.

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Issue Details

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We already have tests that verify:

• The creation of TarEntry instances for fifo, block & character device entry types.
• Reading them from an archive, verifying the correct values of DeviceMajor and DeviceMinor.
• Reading them from the filesystem and generating TarEntry instances, verifying the correct values of DeviceMajor and DeviceMinor.
• Writing them to an archive, and verifying the data was correctly written.
• Checking that an exception is thrown when the user is not a superuser in Unix when attempting to extract such entries.
• Checking they are unsupported entries on Windows.

But we don't yet have tests for successful extraction of such entries entry types to the file system.

Pending confirm that the exotic runtime-extra-platforms do not have weird behaviors.

Author:	carlossanlop
Assignees:	carlossanlop
Labels:	area-System.IO
Milestone:	7.0.0

[carlossanlop]

/azp run runtime-extra-platforms

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Azure Pipelines successfully started running 1 pipeline(s).

[adamsitnik]

LGTM, thank you @carlossanlop !

[carlossanlop]

The test failures in runtime-extra-platforms are unrelated to Tar.