ci:use llgo main

[luoliwoshang]

use main llgo will cause https://github.com/goplus/llcppg/actions/runs/12705801450/job/35417826143?pr=149

Run llgo cmptest ./_xtool/llcppsigfetch/parse/cvt_test/...
# github.com/goplus/llcppg/_xtool/llcppsigfetch/parse/cvt_test/complex_test/forwarddecl_test
# github.com/goplus/llcppg/_xtool/llcppsigfetch/parse/cvt_test/decl_test/class_test
# github.com/goplus/llcppg/_xtool/llcppsigfetch/parse/cvt_test/decl_test/comment_test
# github.com/goplus/llcppg/_xtool/llcppsigfetch/parse/cvt_test/decl_test/enum_test
# github.com/goplus/llcppg/_xtool/llcppsigfetch/parse/cvt_test/decl_test/func_test
# github.com/goplus/llcppg/_xtool/llcppsigfetch/parse/cvt_test/decl_test/scope_test
# github.com/goplus/llcppg/_xtool/llcppsigfetch/parse/cvt_test/decl_test/struct_test
# github.com/goplus/llcppg/_xtool/llcppsigfetch/parse/cvt_test/decl_test/typedef_test
# github.com/goplus/llcppg/_xtool/llcppsigfetch/parse/cvt_test/decl_test/union_test
# github.com/goplus/llcppg/_xtool/llcppsigfetch/parse/cvt_test/preprocess_test
# github.com/goplus/llcppg/_xtool/llcppsigfetch/parse/cvt_test/type_test
# github.com/goplus/llcppg/_xtool/llcppsymg/_cmptest/args_test
ld.lld: error: undefined symbol: sort.init
>>> referenced by fmt
>>>               /tmp/001b5f8365b7fbc7b536f9752847cf8011a[20](https://github.com/goplus/llcppg/actions/runs/12705801450/job/35417825902?pr=149#step:9:21)530fb70ab887f758853a211ada9-d-fb0355.o:(fmt.init)
clang: error: linker command failed with exit code 1 (use -v to see invocation)
# github.com/goplus/llcppg/_xtool/llcppsymg/_cmptest/clangutils_test
ld.lld: error: undefined symbol: sort.init
>>> referenced by fmt
>>>               /tmp/001b5f8365b7fbc7b536f9752847cf8011a20530fb70ab887f758853a[21](https://github.com/goplus/llcppg/actions/runs/12705801450/job/35417825902?pr=149#step:9:22)1ada9-d-0a5759.o:(fmt.init)
clang: error: linker command failed with exit code 1 (use -v to see invocation)
# github.com/goplus/llcppg/_xtool/llcppsymg/_cmptest/config_test
ld.lld: error: undefined symbol: sort.Ints