Revert "first cut - migrate settings marked with INTERNAL and adopt to advanced tag"

[alexdima]

Reverts #1717

[Copilot]

Pull Request Overview

This PR reverts a previous change (#1717) that migrated internal configuration settings from the AdvancedExperimental and AdvancedExperimentalExperiments namespaces to the Internal namespace and removed the "advanced" configuration section from package.json.

Key changes:

• Moves configuration definitions back from ConfigKey.Internal to ConfigKey.AdvancedExperimental and ConfigKey.AdvancedExperimentalExperiments namespaces
• Restores the "advanced" configuration section in package.json with all previously migrated settings
• Updates all usage sites across the codebase to reference the original configuration key locations
• Reverts configuration service implementation changes related to old key migration support

Reviewed Changes

Copilot reviewed 59 out of 59 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/platform/configuration/common/configurationService.ts	Restores AdvancedExperimental namespaces, removes Internal namespace consolidation, adds back migration support
src/platform/configuration/vscode/configurationServiceImpl.ts	Removes unused imports, restores old key fallback logic in configuration resolution
src/platform/configuration/test/common/configurationService.spec.ts	Updates test assertions to verify settings under AdvancedExperimental namespaces instead of Internal
src/extension/configuration/vscode-node/configurationMigration.ts	Moves ConfigurationMigrationRegistry definition from common to here
package.json	Restores "advanced" configuration section with 50+ settings
package.nls.json	Removes localization strings for migrated settings (no longer public)
src/extension/test/node/configurations.spec.ts	Updates tests to handle AdvancedExperimental settings and validate against package.json
Multiple extension files	Updates all ConfigKey references from Internal back to AdvancedExperimental/AdvancedExperimentalExperiments

[Copilot]

The event firing logic is missing in the registerConfigurationMigrations method. The original implementation (being removed from configurationService.ts) included this._onDidRegisterConfigurationMigrations.fire(configurationMigrations); after pushing migrations, but the new implementation in this file omits this line. This could cause listeners to not be notified when configuration migrations are registered.

[Copilot]

[nitpick] Unnecessary import reordering. The import statement for isHiddenModelB, isHiddenModelC, isHiddenModelD is being moved from line 8 to line 19 without any functional reason. This adds unnecessary diff noise. Consider keeping imports in their original position during a revert to minimize changes.

[Copilot]

[nitpick] Unnecessary import reordering. The import statement for toInternalPosition is being moved from line 36 to line 41 without any functional reason. This adds unnecessary diff noise. Consider keeping imports in their original position during a revert to minimize changes.

Suggested change

	import { AnyDiagnosticCompletionItem, AnyDiagnosticCompletionProvider } from './diagnosticsBasedCompletions/anyDiagnosticsCompletionProvider';
	import { AsyncDiagnosticCompletionProvider } from './diagnosticsBasedCompletions/asyncDiagnosticsCompletionProvider';
	import { Diagnostic, DiagnosticCompletionItem, DiagnosticInlineEditRequestLogContext, distanceToClosestDiagnostic, IDiagnosticCompletionProvider, log, logList, sortDiagnosticsByDistance } from './diagnosticsBasedCompletions/diagnosticsCompletions';
	import { ImportDiagnosticCompletionItem, ImportDiagnosticCompletionProvider } from './diagnosticsBasedCompletions/importDiagnosticsCompletionProvider';
	import { toInternalPosition } from '../utils/translations';
	import { toInternalPosition } from '../utils/translations';
	import { AnyDiagnosticCompletionItem, AnyDiagnosticCompletionProvider } from './diagnosticsBasedCompletions/anyDiagnosticsCompletionProvider';
	import { AsyncDiagnosticCompletionProvider } from './diagnosticsBasedCompletions/asyncDiagnosticsCompletionProvider';
	import { Diagnostic, DiagnosticCompletionItem, DiagnosticInlineEditRequestLogContext, distanceToClosestDiagnostic, IDiagnosticCompletionProvider, log, logList, sortDiagnosticsByDistance } from './diagnosticsBasedCompletions/diagnosticsCompletions';
	import { ImportDiagnosticCompletionItem, ImportDiagnosticCompletionProvider } from './diagnosticsBasedCompletions/importDiagnosticsCompletionProvider';