Fix license header inconsistencies

[github-actions]

This PR standardizes license headers across applicable files by adding missing licenses and fixing formatting issues.
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[github-actions]

Merging this branch will not change overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/dell/goscaleio	90.23% (ø)
github.com/dell/goscaleio/inttests	0.00% (ø)
github.com/dell/goscaleio/types/v1	0.00% (ø)

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Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/dell/goscaleio/types/v1/protectionDomainTypes.go	0.00% (ø)	0	0	0
github.com/dell/goscaleio/types/v1/vTreeTypes.go	0.00% (ø)	0	0	0

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

Changed unit test files

• github.com/dell/goscaleio/drv_cfg_test.go
• github.com/dell/goscaleio/inttests/vtree_test.go
• github.com/dell/goscaleio/system_test.go
• github.com/dell/goscaleio/types/v1/protectionDomainTypes_test.go
• github.com/dell/goscaleio/types/v1/types_test.go
• github.com/dell/goscaleio/user_test.go
• github.com/dell/goscaleio/vtree_test.go