fix(core): attach root inquirer for nested transient providers

[kamilmysliwiec]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior?

Issue Number: #15467

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

[coveralls]

Pull Request Test Coverage Report for Build 8932056d-0c39-44f2-853a-aad2d7976e9d

Details

• 4 of 8 (50.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.02%) to 88.894%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/core/injector/injector.ts	2	3	66.67%
packages/core/injector/instance-wrapper.ts	2	5	40.0%

Totals
Change from base Build 935f69e8-a45c-48dd-98f2-32ed0f271410:	-0.02%
Covered Lines:	7284
Relevant Lines:	8194

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💛 - Coveralls