add runner tag to speed kernel build

Add tag 'amd64-large' for runner to speed amd64 kernel build. Kernel build is very slow when we switch builders from static to dynamic. The amd64-large instance is 16 vCPU instead of 2 vCPU.

Test:
(1) The deb packages' number of this branch for build and build-signed jobs are same with the older release.
(2) No new job failure appears.
(3) Build time is less than 1hr.