Disallow using sr25519 addresses for evm send and other funcs

[philipsu522]

Describe your changes and provide context

Similar to https://github.com/sei-protocol/sei-cosmos/pull/495/files, priv, err := legacy.PrivKeyFromBytes([]byte(localInfo.PrivKeyArmor)) only works with secp256k1 algo, so we should disallow using sr25519 addresses

Testing performed to validate your change

root@ip-172-31-4-247:/home/ubuntu/sei-chain# printf "12345678\n" | seid tx evm send 0xF87A299e6bC7bEba58dbBe5a5Aa21d49bCD16D52  100000000000000000 --from sei-foundation
Error: can only use addresses using secp256k1

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 61.09%. Comparing base (9df725e) to head (40293d7).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1605   +/-   ##
=======================================
  Coverage   61.08%   61.09%           
=======================================
  Files         365      365           
  Lines       26104    26107    +3     
=======================================
+ Hits        15945    15949    +4     
+ Misses       9154     9153    -1     
  Partials     1005     1005           

Files	Coverage Δ
evmrpc/utils.go	76.04% <0.00%> (-1.21%)	⬇️

... and 1 file with indirect coverage changes