LU-9907 build: add patchless server for lbuild

LU-9907 build: add patchless server for lbuild

Adding lbuild support for building patchless server
Cleanup unused TARGET_ARCHS and BUILD_ARCHS

Test-Parameters: trivial

Lustre-change: https://review.whamcloud.com/#/c/28672/
Lustre-commit: 7018f18957817afd5dcd3b6f173e7634b93101e9

Change-Id: I946352fa243c86d5729779406264e6ee37856145
Signed-off-by: Minh Diep <minh.diep@intel.com>
Reviewed-on: https://review.whamcloud.com/28952
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>