igt/kms_rotation_crc: Add a new subtest to exhaustively test for fence leaks (v3)

In this subtest, as a first step, MAX_FENCES+1 number of framebuffers are
created backed up by objects that have multiple GGTT views (normal and
rotated). Next, we have the i915 driver instantiate a normal view followed
by a rotated view. We continue doing the above MAX_FENCES + 1 times.

v2:
- Add a igt_require() to check if there is enough GTT space left for
  MAX_FENCES+1 framebuffers. (Tvrtko)
- Make data2 local to test_plane_rotation_exhaust_fences(). (Tvrtko)
- If there is a failure, deallocate all the previously allocated
  framebuffers before asserting.

v3: Close the gem handle if set_tiling or addfb fails. (Tvrtko)

Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

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