use query storage helper

[shunjizhan]

Change

Using api to query storage still has the memory issue polkadot-js/api#5981, so we switch back to the original query storage helper, but removed all cache for storage query, because there was a bug in the cache, and as we mentioned in #1039, caching storage won't be too useful.

We still keep the blockHash => { blockNumber, Header, BlockData } cache introduced in #1039 , which are commonly used. We keep the apiAt cache as well, which can speed up runtime calls.

[codecov]

Codecov Report

Attention: Patch coverage is 96.87500% with 1 line in your changes missing coverage. Please review.

Project coverage is 78.15%. Comparing base (38be323) to head (02e724d).

Files with missing lines	Patch %	Lines
packages/eth-providers/src/utils/queryStoarge.ts	95.23%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1051      +/-   ##
==========================================
+ Coverage   78.09%   78.15%   +0.05%     
==========================================
  Files          55       56       +1     
  Lines        2721     2737      +16     
  Branches      616      624       +8     
==========================================
+ Hits         2125     2139      +14     
- Misses        583      585       +2     
  Partials       13       13              

Files with missing lines	Coverage Δ
packages/eth-providers/src/base-provider.ts	83.53% <100.00%> (-0.22%)	⬇️
packages/eth-providers/src/utils/parseBlock.ts	95.40% <100.00%> (ø)
packages/eth-providers/src/utils/queryStoarge.ts	95.23% <95.23%> (ø)