Reland [RISCV] Add Xqci Insn Formats (#134134)
This adds the following instruction formats from the Xqci Spec:
- QC.EAI
- QC.EI
- QC.EB
- QC.EJ
- QC.ES
The update to the THead test is because the largest number of operands
for a valid instruction has been bumped by this change.
This reverts commit 68fb7a5a1d203dde7badf67031bdd9eb650eef5d. This
relands commit 0cfabd37df9940346f3bf8a4d74c19e1f48a00e9.
