igt@kms_rotation_crc@.* is agonizingly slow on all platforms

These tests are responsible for a significant amount of the overall reported time of a CI FULL run:

• shard-skl: 10.2% (~22 minutes)
• shard-kbl: 6% (~8 minutes)
• shard-apl: 3.9% (~7 minutes)
• shard-glk: 8% (~18 minutes)
• shard-icl: 11% (~22 minutes)
• shard-tgl: 7.1% (~14 minutes)

Current efforts to reduce the exec time:

• tests/kms_rotation_crc: Speed up by not testing every format from @vsyrjala: -66% on TGL
• tests/kms_rotation_crc: limit maximum used plane size from JP: -15% on TGL

Unfortunately, the percentages won't add up so we will still need more work.