Merge pull request openshift#8549 from MayXuQQ/ibm_vmtype

OCPBUGS-34712: add tested instance type for IBMCloud

Author: openshift-merge-bot[bot]

docs/user/ibmcloud/tested_instance_types_x86_64.md

@@ -0,0 +1,15 @@
+* `bx2-8x32`
+* `bx2d-4x16`
+* `bx3d-4x20`
+* `cx2-8x16`
+* `cx2d-4x8`
+* `cx3d-8x20`
+* `gx2-8x64x1v100`
+* `gx3-16x80x1l4`
+* `mx2-8x64`
+* `mx2d-4x32`
+* `mx3d-2x20`
+* `ox2-4x32`
+* `ox2-8x64`
+* `ux2d-2x56`
+* `vx2d-4x56`