allow tag feature for virtual-targets with exact name or without type

[grisumbras]

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Proposed changes

Allow <tag> feature to run on virtual targets with exact name or without type.

Currently <tag> is disabled on make targets and other targets with exact name or without type. This makes it unnecessary hard to create targets which has name that depends on the property set. I looked at the history of this behaviour, and it seems to be a remnant of not adding type affixes to sucha targets. At one point <tag> handling was added, but the check for having a type and not having an exact name remained.

Types of changes

• [X] New feature (non-breaking change which adds functionality)

Alternative

Alternative approach is to keep <tag> disabled when name is exact, and just change make targets to not set name to exact.