fix(core): apply global middleware to routes excluded from prefix

[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: #9124

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

[coveralls]

Pull Request Test Coverage Report for Build 139de620-9a75-4f97-a110-92e7106d3925

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 29 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.002%) to 94.119%

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Files with Coverage Reduction	New Missed Lines	%
packages/common/utils/cli-colors.util.ts	2	76.92%
packages/core/injector/injector.ts	27	74.13%

Totals
Change from base Build e91ea7de-dcfb-4674-b478-2fd52536eab1:	-0.002%
Covered Lines:	5761
Relevant Lines:	6121

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💛 - Coveralls