RDKB-58910, RDKB-65211 : Removed Ipv6 product custamisations

[S-Parthiban-Selvaraj]

Pull request overview

This PR removes Sky partner-specific WAN IPv6 address selection logic from four JST templates. Previously, when PartnerId started with sky-, the code used getFirstDownstreamIpInterface() to enumerate WAN IPv6 addresses; now all partners uniformly use getFirstUpstreamIpInterface(). This aligns these pages with similar pages already using upstream-only enumeration (e.g., DPoE.jst, captiveportal.jst).

Changes:

• Removed Sky-specific if/else branches that used $fistDSif for WAN IPv6 enumeration on network setup and connection status pages.
• Consolidated to a single upstream-interface IPv6 enumeration loop on both xb3 and xb6 variants.
• Removed the now-unused $partnerId lookup in the two connection status files.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
source/Styles/xb3/jst/network_setup.jst	Drop Sky downstream-interface branch; always use upstream interface for WAN IPv6/link-local/lease enumeration.
source/Styles/xb6/jst/network_setup.jst	Same consolidation as xb3 network_setup.
source/Styles/xb3/jst/connection_status.jst	Remove Sky branch and unused $partnerId lookup; single upstream-interface loop for WAN IPv6.
source/Styles/xb6/jst/connection_status_onewifi.jst	Same consolidation as xb3 connection_status (no break after match, matching prior behavior).

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[Copilot]

Pull request overview

This PR removes Sky partner-specific WAN IPv6 address selection logic from four JST templates. Previously, when PartnerId started with sky-, the code used getFirstDownstreamIpInterface() to enumerate WAN IPv6 addresses; now all partners uniformly use getFirstUpstreamIpInterface(). This aligns these pages with similar pages already using upstream-only enumeration (e.g., DPoE.jst, captiveportal.jst).

Changes:

• Removed Sky-specific if/else branches that used $fistDSif for WAN IPv6 enumeration on network setup and connection status pages.
• Consolidated to a single upstream-interface IPv6 enumeration loop on both xb3 and xb6 variants.
• Removed the now-unused $partnerId lookup in the two connection status files.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
source/Styles/xb3/jst/network_setup.jst	Drop Sky downstream-interface branch; always use upstream interface for WAN IPv6/link-local/lease enumeration.
source/Styles/xb6/jst/network_setup.jst	Same consolidation as xb3 network_setup.
source/Styles/xb3/jst/connection_status.jst	Remove Sky branch and unused $partnerId lookup; single upstream-interface loop for WAN IPv6.
source/Styles/xb6/jst/connection_status_onewifi.jst	Same consolidation as xb3 connection_status (no break after match, matching prior behavior).

---

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