Add support for Tendermint Core v0.34.21

[thanethomson]

Adds support for Tendermint Core v0.34.21, the main change being the addition of the new [storage] configuration file section.

This change additionally streamlines the dev/testing Docker image creation process a little.

The vast majority of this PR is automatically generated JSON files from the RPC probe.

---

• Referenced an issue explaining the need for the change
• Updated all relevant documentation in docs
• Updated all code comments where relevant
• Wrote tests
• Added entry in .changelog/

[codecov-commenter]

Codecov Report

Merging #1198 (0897446) into main (57e5c9b) will decrease coverage by 0.6%.
The diff coverage is 30.7%.

@@           Coverage Diff           @@
##            main   #1198     +/-   ##
=======================================
- Coverage   67.7%   67.0%   -0.7%     
=======================================
  Files        214     219      +5     
  Lines      20505   20709    +204     
=======================================
+ Hits       13886   13891      +5     
- Misses      6619    6818    +199     

Impacted Files	Coverage Δ
tendermint/src/time.rs	98.5% <ø> (-0.1%)	⬇️
config/src/config.rs	54.7% <10.0%> (-0.4%)	⬇️
config/tests/mod.rs	99.4% <100.0%> (+0.5%)	⬆️
rpc/tests/kvstore_fixtures.rs	98.0% <100.0%> (ø)
tendermint/src/block.rs	54.9% <0.0%> (-24.2%)	⬇️
tendermint/src/public_key.rs	72.7% <0.0%> (-1.1%)	⬇️
testgen/src/vote.rs	84.0% <0.0%> (-0.9%)	⬇️
rpc/src/client/transport/websocket.rs	65.6% <0.0%> (-0.6%)	⬇️
rpc/src/client/transport/http.rs	31.0% <0.0%> (-0.2%)	⬇️
abci/src/server.rs	9.2% <0.0%> (-0.2%)	⬇️
... and 16 more

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