Mesh 2098/store tracker address

[HenriqueNogara]

Stores api upgrades on polymesh_contracts storage.

changelog

new features

• Adds the upgrade_api extrinsic;
• Adds the GetLatestApiUpgrade chain extension call;

modified API

• Adds the ApiHashUpdated event;

[codecov[bot]]

Codecov Report

Merging #1559 (2e357a4) into develop (f2a70e1) will decrease coverage by 0.03%. The diff coverage is 0.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1559 +/- ## =========================================== - Coverage 58.50% 58.48% -0.03% =========================================== Files 142 142 Lines 32173 32185 +12 =========================================== Hits 18824 18824 - Misses 13349 13361 +12 ``` | [Files](https://app.codecov.io/gh/PolymeshAssociation/Polymesh/pull/1559?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PolymeshAssociation) | Coverage Δ | | |---|---|---| | [pallets/runtime/develop/src/runtime.rs](https://app.codecov.io/gh/PolymeshAssociation/Polymesh/pull/1559?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PolymeshAssociation#diff-cGFsbGV0cy9ydW50aW1lL2RldmVsb3Avc3JjL3J1bnRpbWUucnM=) | `3.65% <0.00%> (ø)` | | | [pallets/weights/src/polymesh\_contracts.rs](https://app.codecov.io/gh/PolymeshAssociation/Polymesh/pull/1559?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PolymeshAssociation#diff-cGFsbGV0cy93ZWlnaHRzL3NyYy9wb2x5bWVzaF9jb250cmFjdHMucnM=) | `26.66% <0.00%> (-2.32%)` | :arrow_down: | ... and [2 files with indirect coverage changes](https://app.codecov.io/gh/PolymeshAssociation/Polymesh/pull/1559/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PolymeshAssociation)