Revert "Upgrade buildroot to 2026.02.0" #1080

Job	Run time
check-trigger	2s
unit-test / Build infix x86_64_minimal	2m 9s
build-arm / Build infix arm_minimal	28m 37s
build-x86_64 / Build infix x86_64_minimal	28m 56s
build-aarch64 / Build infix aarch64_minimal	29m 47s
test-run-x86_64 / Regression Test infix x86_64_minimal	43m 53s
test-publish-x86_64	-1s
	2h 13m 23s

Provide feedback