TCQ SW cleanup

During spec review, it was noted that two CDF tables for coding UV coefficients in the current SW contained an extraneous unused dimension. This MR attempts to clean them up and to align with the spec.

Reference links:

• https://groups.aomedia.org/g/wg-codec/files/InputDocuments/G2026/CWG-G014/CWG-G014-v1_Coefficient_Coding_SpecSW_Analysis.pdf
• https://github.com/AOMediaCodec/av2-spec-internal/issues/482