Check LLGO_ROOT with pkg github.com/goplus/llgo/runtime

[cpunion]

Fix #1252

Don't need distribute llgo/go.{mod,sum}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.87%. Comparing base (2160710) to head (0cac1c8).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1255      +/-   ##
==========================================
+ Coverage   87.84%   87.87%   +0.03%     
==========================================
  Files          35       35              
  Lines        9008     9008              
==========================================
+ Hits         7913     7916       +3     
+ Misses        982      980       -2     
+ Partials      113      112       -1     

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[luoliwoshang]

It's work for me

this release is base this pr's submit https://github.com/luoliwoshang/llgo/releases/tag/v0.0.1-llgoroot.1

Code/temp/ttt on  main [✘!+?⇕] via 🐹 v1.24.6 via 💎 v2.6.10 
❯ /Users/zhangzhiyang/Downloads/llgo0.0.1-llgoroot.1.darwin-arm64/bin/llgo run main.go
hello