refactor(microservices): add warn for post-initialization configuration

[isaryy]

Add warnings for post-initialization microservice configuration

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?

• Bug fix
• 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?

When global configuration methods (useGlobalFilters, useGlobalPipes, etc.) are called on a microservice instance after initialization, the configuration is silently ignored without any warning.

const microservice = app.connectMicroservice(options);
// These calls silently do nothing:
microservice.useGlobalFilters(new Filter()); // ❌ No effect, no warning

Issue Number: N/A

What is the new behavior?

Added warning messages when global configuration methods are called after microservice initialization.

const microservice = app.connectMicroservice(options);
microservice.useGlobalFilters(new Filter());
// Warning: Global filters registered after initialization will not be applied.

Methods with warnings:

• useGlobalFilters()
• useGlobalPipes()
• useGlobalInterceptors()
• useGlobalGuards()
• useWebSocketAdapter()

Does this PR introduce a breaking change?

• Yes
• No

Other information

Improves developer experience by providing immediate feedback when configuration won't work, eliminating confusion about why global handlers aren't being applied.

[coveralls]

Pull Request Test Coverage Report for Build fd0fe96d-8c5a-4568-ad4d-e856486c2779

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 88.94%

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Totals
Change from base Build cbdbfe31-770d-4936-b123-f113ab433f9c:	0.0%
Covered Lines:	7197
Relevant Lines:	8092

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💛 - Coveralls

[kamilmysliwiec]

lgtm