Reorganize internal queries code by predicate typ

Describe the Issue

Current queries are organized in files by return type (getByAPI.js, queryByAPI.js, findByAPI.js) with exception for A11yAPI.js which is organized by predicate (byA11yLabel, byA11yHint, etc). Generally getBy and getAllBy queries are used as core query, with queryBy/queryAllBy and findBy/findAllBy as manually written wrappers around getBy/getAllBy quries.

There is a lot of repeated code, especially in duplicate getBy and getAllBy queries as well as manual queryBy/queryAllBy/findBy/… wrappers.

This presents an opportunity to refactor queries so that for each predicate type (ByText, byA11yLabel, etc) there is only function encoding the search algorithm, while all other functions are generated by some generic code.

In Testing Library this is achieved by implementing query predicates as queryAll function first, and then using generic buildQueries function that returnes getBy/getAllBy/etc variants.

Benefits

1. Single definition of each predicate, so avoiding recent getByTestId/getAllByTestId differences.
2. Easier creation of additional predicates, you just need to create queryAll version and all other queries will generated for you by buildQueries function.
3. Reduced code side

Downsides

None found yet.

Considerations

1. This change should not change the API
2. We should keep the same unit tests, but we might reorganize them by predicate vs by return type to match new queries file structure.
3. Queries performance should be the same, because react-test-renderer find uses findAll under the hood without any query optimization.
4. Typescript typings tests should probably stay the same, i.e. repeated use-case statements, and not be generated for code correctness reasons.

[MattAgn]

@mdjastrzebski should we close this issue now that our PR is merged?

[mdjastrzebski]

Seems like the transition to by predicate code organisation is mostly done:

• common query builder (makeQueries) in order to define predicate once
• put each query predicate in separate file instead of grouping queries by query verb (get, query, …)
• tests grouped by predicate instead of query verb

To finish the transition I think we should do some final smaller tasks:

• Replace GetByAPI, QueryByAPI and FindByAPI types and functions (xxxByAPI) with per query type (ByXxx) interfaces
• Migrate A11y query builder (makeA11Query) to use standard query builder(makeQueries) in order to allow more flexibity with query parameters and also improve code coherence, reduce over-abstraction.
• Move query implementations from src/helpers to src/queries

@thymikee @MattAgn @AugustinLF wdyt?