Remove docker building during e2e test

[ulbqb]

Description

This PR stops caching docker image because this was for libsodium and change it to become the same as original jobs.
original: https://github.com/tendermint/tendermint/blob/v0.34.24/.github/workflows/e2e.yml

Closes: #XXX

[codecov]

Codecov Report

Merging #732 (2a26051) into main (c8b0705) will increase coverage by 0.05%.
Report is 2 commits behind head on main.
The diff coverage is n/a.

❗ Current head 2a26051 differs from pull request most recent head 622d7c1. Consider uploading reports for the commit 622d7c1 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #732      +/-   ##
==========================================
+ Coverage   66.49%   66.55%   +0.05%     
==========================================
  Files         285      285              
  Lines       37919    37919              
==========================================
+ Hits        25216    25238      +22     
+ Misses      10892    10878      -14     
+ Partials     1811     1803       -8     

see 9 files with indirect coverage changes