fix: ensure upstream scheme is set only if not already defined in HTTP route translation (#2691) (c48e9b3)

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🔄 Automated Backport

• Upstream commit: apache/apisix-ingress-controller@c48e9b3
• Original title: fix: ensure upstream scheme is set only if not already defined in HTTP route translation (#2691)
• Original author: Timmy zhu327@gmail.com

Please review and run the relevant validation before merging.

Created automatically by backport-bot.

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[AlinsRan]

Closing as part of removing the auto-backport workflow (#469).

This PR was opened by the auto-backport bot, which has been broken since 2026-03-13 and is being deleted. The change here is either not applicable to this repo (upstream release chores, dependency bumps, upstream-only docs) or has already landed here through a manual backport. Upstream changes are now backported per PR by hand using the (backport apache/apisix-ingress-controller#NNNN) convention; if this one is still wanted, open a fresh PR that way.