erc20: rename intrarelayer module

[fedekunze]

Part of https://linear.app/tharsis/issue/ENG-341/rebrand-intrarelayer-module-to-erc20

[codecov]

Codecov Report

Merging #173 (85a7c5c) into main (d16ca65) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #173   +/-   ##
=======================================
  Coverage   72.61%   72.61%           
=======================================
  Files          24       24           
  Lines        1727     1727           
=======================================
  Hits         1254     1254           
  Misses        421      421           
  Partials       52       52           

Impacted Files	Coverage Δ
x/erc20/keeper/evm.go	72.36% <ø> (ø)
x/erc20/keeper/evm_hooks.go	54.79% <ø> (ø)
x/erc20/keeper/gov_hooks.go	81.13% <ø> (ø)
x/erc20/keeper/grpc_query.go	71.15% <ø> (ø)
x/erc20/keeper/keeper.go	87.50% <ø> (ø)
x/erc20/keeper/migrations.go	100.00% <ø> (ø)
x/erc20/keeper/msg_server.go	79.21% <ø> (ø)
x/erc20/keeper/params.go	100.00% <ø> (ø)
x/erc20/keeper/token_pairs.go	100.00% <ø> (ø)
x/erc20/types/codec.go	0.00% <ø> (ø)
... and 11 more