interpreter: (riscv_debug) add implementation for riscv_debug.printf

[superlopuh]

Reopening accidental merge of #1991

[compor]

sorry for that, it is usually good practice to mention if something is stack on the PR message.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (62e23e8) 89.96% compared to head (deee126) 89.97%.
Report is 2 commits behind head on sasha/riscv_debug/printf.

Additional details and impacted files

@@                     Coverage Diff                      @@
##           sasha/riscv_debug/printf    #1998      +/-   ##
============================================================
+ Coverage                     89.96%   89.97%   +0.01%     
============================================================
  Files                           288      290       +2     
  Lines                         35797    35830      +33     
  Branches                       5270     5271       +1     
============================================================
+ Hits                          32204    32239      +35     
+ Misses                         2834     2830       -4     
- Partials                        759      761       +2     

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