codegen: add S161 for multidimensional input buffer to use array.size

[rahur-NI]

• This contribution adheres to CONTRIBUTING.md.
• I've updated CHANGELOG.md if applicable.
• I've added tests applicable for this pull request

What does this Pull Request accomplish?

This PR Includes the S161 size-parameter codegen path for input buffers so multidimensional arrays use total element count .

Before this fix, S160 used len(array_name), which undercounted multidimensional inputs by returning only the first dimension; now it uses array_name.size when array_dimensions > 1.

Updated the documentation for S160 code as well as it supports 1-dimentional and preserves existing len(array_name) behavior for 1D/default inputs.

List issues fixed by this Pull Request below, if any.

What testing has been done?

• Add a unit test for S161 with array_dimensions > 1 to verify .size is generated.
• Keep the existing S160 1D test to verify len(...) behavior still works.
• A successful tox execution

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.13%. Comparing base (538fc94) to head (8dae061).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2166      +/-   ##
==========================================
- Coverage   91.15%   90.13%   -1.03%     
==========================================
  Files          67       71       +4     
  Lines       16477    18685    +2208     
==========================================
+ Hits        15020    16841    +1821     
- Misses       1457     1844     +387     

Flag	Coverage Δ
codegenunittests	84.90% <100.00%> (+0.02%)	⬆️
nidcpowersystemtests	94.65% <ø> (+0.04%)	⬆️
nidcpowerunittests	89.53% <ø> (ø)
nidigitalsystemtests	92.26% <ø> (ø)
nidigitalunittests	68.44% <ø> (ø)
nidmmsystemtests	92.72% <ø> (ø)
nifakeunittests	85.68% <ø> (ø)
nifgensystemtests	94.61% <ø> (ø)
nimodinstsystemtests	73.85% <ø> (ø)
nimodinstunittests	94.20% <ø> (ø)
nirfsgsystemtests	82.40% <ø> (?)
niscopesystemtests	92.94% <ø> (ø)
niscopeunittests	43.20% <ø> (ø)
nisesystemtests	91.50% <ø> (ø)
niswitchsystemtests	82.03% <ø> (ø)
nitclksystemtests	94.87% <ø> (ø)
nitclkunittests	98.26% <ø> (ø)

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Files with missing lines	Coverage Δ
build/helper/codegen_helper.py	83.87% <100.00%> (+0.15%)	⬆️

... and 5 files with indirect coverage changes

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