feat(orm): add module db (#10991)

## Description

This PR adds a `ModuleDB` interface which can be used directly by Cosmos SDK modules. A simplified bank example with Mint/Send/Burn functionality against Balance and Supply tables is included in the tests.

This PR also:
* adds simplified `Get` and `Has` methods to `Table` which use the primary key values in the message instead of `...interface{}`
* adds a stable deterministic proto JSON marshaler and updates the `Entry.String` methods to use it because the golden tests are not deterministic without this. This code is currently internal but can be extracted to a public `codec` or `cosmos-proto` package eventually.

---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

orm/model/ormdb/testdata/bank_scenario.golden

@@ -0,0 +1,58 @@
+GET 010200666f6f 
+    PK testpb.Supply foo -> {"denom":"foo"}
+GET 010200666f6f 
+    PK testpb.Supply foo -> {"denom":"foo"}
+ORM INSERT testpb.Supply {"denom":"foo","amount":100}
+SET 010200666f6f 1064
+    PK testpb.Supply foo -> {"denom":"foo","amount":100}
+GET 010100626f6200666f6f 
+    PK testpb.Balance bob/foo -> {"address":"bob","denom":"foo"}
+GET 010100626f6200666f6f 
+    PK testpb.Balance bob/foo -> {"address":"bob","denom":"foo"}
+ORM INSERT testpb.Balance {"address":"bob","denom":"foo","amount":100}
+SET 010100626f6200666f6f 1864
+    PK testpb.Balance bob/foo -> {"address":"bob","denom":"foo","amount":100}
+SET 010101666f6f00626f62 
+    IDX testpb.Balance denom/address : foo/bob -> bob/foo
+GET 010100626f6200666f6f 1864
+    PK testpb.Balance bob/foo -> {"address":"bob","denom":"foo","amount":100}
+GET 010200666f6f 1064
+    PK testpb.Supply foo -> {"denom":"foo","amount":100}
+GET 010100626f6200666f6f 1864
+    PK testpb.Balance bob/foo -> {"address":"bob","denom":"foo","amount":100}
+GET 010100626f6200666f6f 1864
+    PK testpb.Balance bob/foo -> {"address":"bob","denom":"foo","amount":100}
+ORM UPDATE testpb.Balance {"address":"bob","denom":"foo","amount":100} -> {"address":"bob","denom":"foo","amount":70}
+SET 010100626f6200666f6f 1846
+    PK testpb.Balance bob/foo -> {"address":"bob","denom":"foo","amount":70}
+GET 01010073616c6c7900666f6f 
+    PK testpb.Balance sally/foo -> {"address":"sally","denom":"foo"}
+GET 01010073616c6c7900666f6f 
+    PK testpb.Balance sally/foo -> {"address":"sally","denom":"foo"}
+ORM INSERT testpb.Balance {"address":"sally","denom":"foo","amount":30}
+SET 01010073616c6c7900666f6f 181e
+    PK testpb.Balance sally/foo -> {"address":"sally","denom":"foo","amount":30}
+SET 010101666f6f0073616c6c79 
+    IDX testpb.Balance denom/address : foo/sally -> sally/foo
+GET 010100626f6200666f6f 1846
+    PK testpb.Balance bob/foo -> {"address":"bob","denom":"foo","amount":70}
+GET 01010073616c6c7900666f6f 181e
+    PK testpb.Balance sally/foo -> {"address":"sally","denom":"foo","amount":30}
+GET 010200666f6f 1064
+    PK testpb.Supply foo -> {"denom":"foo","amount":100}
+GET 010200666f6f 1064
+    PK testpb.Supply foo -> {"denom":"foo","amount":100}
+ORM UPDATE testpb.Supply {"denom":"foo","amount":100} -> {"denom":"foo","amount":97}
+SET 010200666f6f 1061
+    PK testpb.Supply foo -> {"denom":"foo","amount":97}
+GET 01010073616c6c7900666f6f 181e
+    PK testpb.Balance sally/foo -> {"address":"sally","denom":"foo","amount":30}
+GET 01010073616c6c7900666f6f 181e
+    PK testpb.Balance sally/foo -> {"address":"sally","denom":"foo","amount":30}
+ORM UPDATE testpb.Balance {"address":"sally","denom":"foo","amount":30} -> {"address":"sally","denom":"foo","amount":27}
+SET 01010073616c6c7900666f6f 181b
+    PK testpb.Balance sally/foo -> {"address":"sally","denom":"foo","amount":27}
+GET 01010073616c6c7900666f6f 181b
+    PK testpb.Balance sally/foo -> {"address":"sally","denom":"foo","amount":27}
+GET 010200666f6f 1061
+    PK testpb.Supply foo -> {"denom":"foo","amount":97}