Remove PAM build tag from tsh target in Makefile (#11666)
Remove PAM build tag from tsh target in Makefile (#11666)

The PAM tag is not needed when building tsh. Moreover, it was causing
the push-build-windows-amd64 pipeline to fail since lib/teleterm imports
lib/srv/alpnproxy which in turn indirectly depends on lib/pam.
gravitational/teleport,gravitational/teleport,gravitational/teleport,gravitational/teleport,gravitational/teleport,gravitational/teleport