[OpenMPIRBuilder] Do not call host runtime for GPU teams codegen (#79984)

Patch ensures that host runtime functions are not called for handling
OpenMP teams clause on the device.

GPU code for pragma `omp target teams distribute parallel do` will
require only one call to OpenMP loop-worksharing GPU runtime. Support
for it will be added later.

This patch does not include changes required for handling `omp target
teams` for the host side.