[Fix] eth_getStorageAt always returning 0

[0xcb9ff9]

Description

upstream PR: #1546, #1558

The RLP Parsing is already being done by the Snapshot's GetStorage method

Changes include

• Bugfix (non-breaking change that solves an issue)

Breaking changes

eth_getStorageAt result change

Checklist

• I have assigned this PR to myself
• I have added at least 1 reviewer
• I have added the relevant labels

Testing

• I have tested this code with the official test suite
• I have tested this code manually

Manual tests

[codecov-commenter]

Codecov Report

Merging #353 (ff74d14) into dev (c202b4e) will decrease coverage by 0.07%.
The diff coverage is 100.00%.

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@@            Coverage Diff             @@
##              dev     #353      +/-   ##
==========================================
- Coverage   47.66%   47.60%   -0.07%     
==========================================
  Files         136      136              
  Lines       20603    20592      -11     
==========================================
- Hits         9820     9802      -18     
- Misses       9954     9958       +4     
- Partials      829      832       +3     

Impacted Files	Coverage Δ
jsonrpc/eth_endpoint.go	71.38% <100.00%> (+0.42%)	⬆️

... and 4 files with indirect coverage changes

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[DarianShawn]

LGTM

Thanks for the contribution.