Remove tx logs and block bloom from chain state

[yihuang]

Closes #452

Description

• tx logs are stored in transient storage and emitted as events
• block bloom is emitted as event in end block
• RPC API query tx logs block bloom from events of tx result and block result.

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• Wrote unit and integration tests
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• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
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For admin use:

• Added appropriate labels to PR (ex. WIP, R4R, docs, etc)
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[orijbot]

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[codecov]

Codecov Report

Merging #556 (1d4d22d) into main (3f1eeb3) will decrease coverage by 0.40%.
The diff coverage is 65.21%.

❗ Current head 1d4d22d differs from pull request most recent head 76de16a. Consider uploading reports for the commit 76de16a to get more accurate results

@@            Coverage Diff             @@
##             main     #556      +/-   ##
==========================================
- Coverage   53.78%   53.38%   -0.41%     
==========================================
  Files          64       64              
  Lines        5282     5127     -155     
==========================================
- Hits         2841     2737     -104     
+ Misses       2307     2263      -44     
+ Partials      134      127       -7     

Impacted Files	Coverage Δ
x/evm/genesis.go	48.21% <ø> (+3.21%)	⬆️
x/evm/keeper/abci.go	21.42% <0.00%> (ø)
x/evm/keeper/grpc_query.go	65.28% <ø> (-3.17%)	⬇️
x/evm/types/genesis.go	85.71% <ø> (-4.61%)	⬇️
x/evm/types/key.go	0.00% <ø> (ø)
x/evm/keeper/keeper.go	74.41% <36.36%> (+7.30%)	⬆️
x/evm/keeper/msg_server.go	78.43% <100.00%> (+4.62%)	⬆️
x/evm/keeper/state_transition.go	74.30% <100.00%> (ø)
x/evm/keeper/statedb.go	86.22% <100.00%> (ø)
x/evm/types/logs.go	30.58% <0.00%> (-5.89%)	⬇️
... and 3 more

[fedekunze]

ACK. I would also add documentation on the JSON-RPC to turn on event indexing so that people don't run into the issue of not finding the bloom filter or logs.

This change is state machine braking so we also need to add an entry on the CHANGELOG

[yihuang]

ACK. I would also add documentation on the JSON-RPC to turn on event indexing so that people don't run into the issue of not finding the bloom filter or logs.

In this PR, we actually only used the /block_results and /tx?hash= tm rpc to get what we want, I think they are available even when tx indexer is not enabled?
But the tx hash conversion rely on the tx indexer, after we did the tendermint custom tx hasher thing, we can remove that dependency.

This change is state machine braking so we also need to add an entry on the CHANGELOG

changelog added.

[fedekunze]

Thanks @yihuang feel free to fix the linter with make lint-fix