Improve exception for invalid use of dynamically sized struct

[iamdefinitelyahuman]

What I did

Raise ArgumentException when using a dynamically-sized struct as a function input.

How I did it

• Added is_dynamic_size attribute to all type objects within vyper.context
• When generating the function signature, raise if an input is a struct with dynamic size.

How to verify it

Run the tests. I added some new cases.

Cute Animal Picture

[codecov-io]

Codecov Report

Merging #2189 into master will increase coverage by 0.00%.
The diff coverage is 85.71%.

@@           Coverage Diff           @@
##           master    #2189   +/-   ##
=======================================
  Coverage   85.49%   85.49%           
=======================================
  Files          83       83           
  Lines        8503     8517   +14     
  Branches     2056     2059    +3     
=======================================
+ Hits         7270     7282   +12     
- Misses        729      731    +2     
  Partials      504      504           

Impacted Files	Coverage Δ
vyper/context/types/indexable/sequence.py	82.75% <66.66%> (-1.86%)	⬇️
vyper/context/types/bases.py	89.06% <100.00%> (+0.08%)	⬆️
vyper/context/types/function.py	83.95% <100.00%> (+0.30%)	⬆️
vyper/context/types/meta/struct.py	80.32% <100.00%> (+1.01%)	⬆️
vyper/context/types/value/array_value.py	92.10% <100.00%> (+0.10%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b1fbdcd...c4e5ffe. Read the comment docs.