feat(core): introduce different module opaque key factories

[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: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

[coveralls]

Pull Request Test Coverage Report for Build 8992ffcb-4145-4cfe-b21d-217fd51a6835

Details

• 44 of 46 (95.65%) changed or added relevant lines in 5 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.05%) to 92.119%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/core/injector/compiler.ts	7	8	87.5%
packages/core/injector/container.ts	6	7	85.71%

Totals
Change from base Build 8e6acf8c-0eed-48d4-99cf-9df3f506aa5c:	-0.05%
Covered Lines:	6744
Relevant Lines:	7321

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💛 - Coveralls

[H4ad]

Excellent work!