fix: Change Zicntr from mandatory to optional in MC100

[james-ball-qualcomm]

Keep mandatory in MC200 (for now). Seems like package-lock.json also is updated (maybe because I am running in a new devcontainer?).

See CSC Requirements WG discussion about Zicntr at https://lists.riscv.org/g/csc-requirements/topic/116005126

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.05%. Comparing base (fcae1f7) to head (05b35e7).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1223   +/-   ##
=======================================
  Coverage   46.05%   46.05%           
=======================================
  Files          11       11           
  Lines        4942     4942           
  Branches     1345     1345           
=======================================
  Hits         2276     2276           
  Misses       2666     2666           

Flag	Coverage Δ
idlc	46.05% <ø> (ø)

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