[release-1.15] fix(controller): extend BFD liveness probe timeout

[changluyi]

Summary

• Backport PR fix(controller): extend BFD liveness probe timeout #7060 to release-1.15.
• Extend the VPC egress gateway BFD liveness probe timeout from 3s to 10s.
• Update the release-1.15 BFD container unit test expectation.

Notes

The master PR also touched yamls/bfdd-daemonset.yaml, but this file does not exist on release-1.15, so the release backport only updates the equivalent controller implementation and test.

Test Plan

• go test ./pkg/controller -run "TestVpcEgressGatewayContainerBFDDDefaultResources" -count=1
• make lint

[coveralls]

Coverage Report for CI Build 30070993310

Warning

Build has drifted: This PR's base is out of sync with its target branch, so coverage data may include unrelated changes.
Quick fix: rebase this PR. Learn more →

Coverage increased (+0.007%) to 24.85%

Details

• Coverage increased (+0.007%) from the base build.
• Patch coverage: 1 of 1 lines across 1 file are fully covered (100%).
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	55307
Covered Lines:	13744
Line Coverage:	24.85%
Coverage Strength:	0.29 hits per line

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💛 - Coveralls