Cleanup program building a bit

This CL:
   now passes the GrProgramDesc as a const&
   returns GrGLProgram as an sk_sp
   makes the parameter ordering more consistent
   makes GrVkPipelineState no longer ref-counted

This is pulled out of the DDL pre-compile CL which touches this portion of the code.

Bug: skia:9455
Change-Id: Id4d06f93450e276de5a2662be330ae9523026244
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/268777
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
16 files changed