feat (runtime): Add smallest test contract

[evgenykuzyakov]

Adding smallest test contract to establish a baseline for compilation

Test plan:

• NOOP changes

[gitpod-io]

[codecov]

Codecov Report

Merging #3142 into master will decrease coverage by 0.09%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3142      +/-   ##
==========================================
- Coverage   87.49%   87.40%   -0.10%     
==========================================
  Files         212      212              
  Lines       41463    41393      -70     
==========================================
- Hits        36277    36178      -99     
- Misses       5186     5215      +29     

Impacted Files	Coverage Δ
chain/client/src/types.rs	63.75% <0.00%> (-3.75%)	⬇️
chain/client/src/sync.rs	86.21% <0.00%> (-2.28%)	⬇️
chain/network/src/test_utils.rs	90.32% <0.00%> (-1.62%)	⬇️
chain/chain/src/test_utils.rs	91.83% <0.00%> (-0.93%)	⬇️
chain/chunks/src/lib.rs	90.98% <0.00%> (-0.54%)	⬇️
neard/tests/stake_nodes.rs	97.45% <0.00%> (-0.32%)	⬇️
chain/chain/src/doomslug.rs	99.22% <0.00%> (-0.26%)	⬇️
chain/network/src/peer_manager.rs	82.05% <0.00%> (-0.26%)	⬇️
chain/network/tests/runner/mod.rs	97.16% <0.00%> (-0.24%)	⬇️
chain/client/tests/process_blocks.rs	90.06% <0.00%> (-0.23%)	⬇️
... and 5 more

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