Fix upgradable polymesh api and tracker.

[Neopallium]

There is an issue with payable contract methods making DelegateCalls to the upgradable Polymesh Ink! api. A work around is to make the API methods also payable.

Also the upgrade tracker contract was alway using the oldest version, not the newest.

[codecov[bot]]

Codecov Report

Merging #1478 (7f82c3d) into develop (de418e9) will increase coverage by 0.00%. The diff coverage is 0.00%.

@@           Coverage Diff            @@
##           develop    #1478   +/-   ##
========================================
  Coverage    53.94%   53.94%           
========================================
  Files          151      151           
  Lines        32890    32890           
========================================
+ Hits         17741    17742    +1     
+ Misses       15149    15148    -1     

Impacted Files	Coverage Δ
contracts/upgradeable-polymesh-ink/src/macros.rs	44.33% <0.00%> (ø)

... and 6 files with indirect coverage changes