[feat] synchronize NC version with NMA programmed goal state

[NihaNallappagari]

Reason for Change:
Swiftv2 network containers (NCs) are published to a different path in pubsub compared to Swiftv1 NCs, and the NMA getNCDetails API only returns programmed Swiftv1 NC details. For Swiftv2, the programmed NC goal state is exposed through IMDS, so we need to query IMDS to retrieve those NC details. In this code review, I am adding a call to NMA SupportedAPIs to verify that the build includes the required features. If the expected API is present, I proceed to call the IMDS NC details API and combine that information with the Swiftv1 NMA API results to ensure any outdated NCs are updated with the latest details from IMDS or NMA. If the latest build is not detected, the IMDS NCVersions API call is skipped, and only the NMA NCVersions API is used for the query swiftv1 NC goal state

Issue Fixed:

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• relevant PR labels added

Notes:

[Copilot]

Pull Request Overview

Implements delegated network container version updates by combining NMAgent and IMDS version sources and expands related unit tests.

• Removes obsolete log calls in CNS service initializers.
• Enhances syncHostNCVersion to fetch NC versions from IMDS, merge with NMAgent data, and update host state.
• Adds new GetNCVersionsFromIMDS support in IMDS client and covers success and error scenarios with unit tests.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
cns/service/main.go	Removed redundant logger.Printf calls in controller initializers
cns/restserver/restserver.go	Added GetNCVersionsFromIMDS to imdsClient interface
cns/restserver/internalapi.go	Merged IMDS NC versions into syncHostNCVersion and added helper methods
cns/restserver/internalapi_test.go	Expanded SyncHostNCVersion tests to cover IMDS fallback and error cases
cns/imds/client.go	Introduced GetNCVersionsFromIMDS and associated types for network metadata
cns/imds/client_test.go	Added tests for GetNCVersionsFromIMDS, including success and failure cases
cns/fakes/imdsclientfake.go	Mock implementation for GetNCVersionsFromIMDS

Comments suppressed due to low confidence (1)

cns/restserver/internalapi.go:25

• The code uses strings (e.g., strings.ToLower, strings.Contains) and fmt.Errorf but the import block does not include "strings" or "fmt". Add these imports to avoid compile errors.

"github.com/pkg/errors" 

[NihaNallappagari]

/azp run Azure Container Networking PR

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