[Feature] use custom cosmos-sdk and tendermint

[yun-yeo]

Use custom cosmos-sdk with custom tendermint for following items

• oracle tx mempool priority
• configurable iavl cache size
• configurable inter-block cache size

Node Operators can configure new settings
in ~/.terra/config/app.toml

# InterBlockCacheSize set the size (the number of cache items) of interblock cache item
# Each item consumes 128 bytes, so the value should be dividend by 128
# Default cache size is 10mb.
# Ex) 100mb = 10,000,000 / 128 = 78,125
inter-block-cache-size = 78125

# IAVLCacheSize set the cache size (the number of cache items) of the iavl tree.
# Each item size consumes 128 bytes, so the value should be dividend by 128
# Default cache size is 100mb.
# Ex) 100mb = 100,000,000 / 128 = 781,250
iavl-cache-size = 781250

Summary of changes

Report of required housekeeping

• Github issue OR spec proposal link
• Wrote tests
• Updated API documentation (client/lcd/swagger-ui/swagger.yaml)
• Added a relevant changelog entry: clog add [section] [stanza] [message]

---

(FOR ADMIN) Before merging

• Added appropriate labels to PR
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)
• Confirm added tests are consistent with the intended behavior of changes
• Ensure all tests pass

[codecov]

Codecov Report

Merging #655 (7af3338) into main (5fb2f85) will not change coverage.
The diff coverage is n/a.

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##             main     #655   +/-   ##
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  Coverage   44.63%   44.63%           
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  Files         120      120           
  Lines        6999     6999           
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  Hits         3124     3124           
  Misses       3630     3630           
  Partials      245      245           

[yun-yeo]

@faddat This PR and #654 PR will make terrad enable to use RocksDB with configurable iavl-cache-size and inter-block-cache-size what was done #631 .

COSMOS_BUILD_OPTIONS=rocksdb make install
# or you can set this config in ~/.terra/config/app.toml
terrad start --iavl-cache-size=100000 --inter-block-cache-size=10000

in ~/.terra/config/app.toml

# InterBlockCache enables inter-block caching.
inter-block-cache = true

# InterBlockCacheSize set the size (the number of cache items) of interblock cache item
# Each item consumes 128 bytes, so the value should be dividend by 128
# Default cache size is 10mb.
# Ex) 10mb = 10,000,000 / 128 = 78,125
inter-block-cache-size = 78125

# IndexEvents defines the set of events in the form {eventType}.{attributeKey},
# which informs Tendermint what to index. If empty, all events will be indexed.
#
# Example:
# ["message.sender", "message.recipient"]
index-events = []

# IAVLCacheSize set the cache size (the number of cache items) of the iavl tree.
# Each item size consumes 128 bytes, so the value should be dividend by 128
# Default cache size is 100mb.
# Ex) 100mb = 100,000,000 / 128 = 781,250
iavl-cache-size = 781250