Remove dynamic unroll (to simplify the zkDSL compiler, at the cost of a few percent more cycles (but saves some memory))

[TomWambsgans]

BEFORE

                                                        time      size      cycles      memory   poseidons  extension-ops
                 ┌──▸ ◇ 1550 R=1/2 ·· ▸ 1292 XMSS/s - 1.200s   344 KiB     993,320   3,900,503     259,056      30,602
                 ├──▸ ◇ 508 R=1/4 ··· ▸  649 XMSS/s - 0.783s   207 KiB     326,320   1,284,011      85,042      10,068
            ┌──▸ ◆ 2058 - 10 R=1/4 ·· ▸               0.571s   197 KiB     253,675     798,694      28,196     103,437
            │    ┌──▸ ◇ 1550 R=1/4 ·· ▸  937 XMSS/s - 1.654s   229 KiB     993,302   3,900,503     259,056      30,619
            │    ├──▸ ◇ 508 R=1/4 ··· ▸  647 XMSS/s - 0.785s   209 KiB     326,370   1,284,011      85,042      10,118
            ├──▸ ◆ 2058 - 10 R=1/4 ·· ▸               0.529s   197 KiB     222,807     691,320      23,018      83,416
       ┌──▸ ◆ 4096 + 25 - 5 R=1/2 ··· ▸               0.453s   297 KiB     253,106     812,521      29,495      79,672
       │    ┌──▸ ◇ 775 R=1/4 ········ ▸  896 XMSS/s - 0.865s   208 KiB     497,266   1,953,647     129,631      15,361
       │    ├──▸ ◇ 775 R=1/4 ········ ▸  912 XMSS/s - 0.850s   209 KiB     497,311   1,953,647     129,631      15,363
       ├──▸ ◆ 1550 - 5 R=1/4 ········ ▸               0.542s   195 KiB     215,036     642,969      21,172      89,016
  ┌──▸ ◆ 5661 + 10 - 2 R=1/4 ········ ▸               0.812s   198 KiB     295,530     922,179      34,786      98,674
  ◆ 5669 R=1/16 ····················· ▸               0.633s   131 KiB      97,518     326,329       9,164      44,703

AFTER

                                                        time      size      cycles      memory   poseidons  extension-ops
                 ┌──▸ ◇ 1550 R=1/2 ·· ▸ 1279 XMSS/s - 1.211s   345 KiB     993,664   3,898,904     259,056      30,602
                 ├──▸ ◇ 508 R=1/4 ··· ▸  656 XMSS/s - 0.775s   207 KiB     326,333   1,283,093      85,042      10,068
            ┌──▸ ◆ 2058 - 10 R=1/4 ·· ▸               0.570s   196 KiB     256,962     759,745      28,196     103,437
            │    ┌──▸ ◇ 1550 R=1/4 ·· ▸  921 XMSS/s - 1.684s   229 KiB     993,646   3,898,904     259,056      30,619
            │    ├──▸ ◇ 508 R=1/4 ··· ▸  654 XMSS/s - 0.776s   209 KiB     326,383   1,283,093      85,042      10,118
            ├──▸ ◆ 2058 - 10 R=1/4 ·· ▸               0.532s   195 KiB     226,094     652,371      23,018      83,416
       ┌──▸ ◆ 4096 + 25 - 5 R=1/2 ··· ▸               0.447s   296 KiB     260,054     748,828      29,495      79,672
       │    ┌──▸ ◇ 775 R=1/4 ········ ▸  930 XMSS/s - 0.833s   208 KiB     497,406   1,953,378     129,631      15,361
       │    ├──▸ ◇ 775 R=1/4 ········ ▸  938 XMSS/s - 0.826s   208 KiB     497,451   1,953,378     129,631      15,363
       ├──▸ ◆ 1550 - 5 R=1/4 ········ ▸               0.534s   197 KiB     217,517     619,678      21,172      89,016
  ┌──▸ ◆ 5661 + 10 - 2 R=1/4 ········ ▸               0.798s   198 KiB     305,308     870,522      34,786      98,674
  ◆ 5669 R=1/16 ····················· ▸               0.639s   130 KiB      97,518     326,329       9,164      44,703