chore: rename rest apis

[egonspace]

Description

This PR contains two subjects.

• rename rest api (cosmos -> lbm)
• fix uploading codecov result (modified file: .github/workflows/test.yml)

I first uploaded this PR because of the second issue(uploading codecov result), but I couldn't check if the result was uploaded well because there was no code difference. Therefore, code modifications were required, and simple modifications were included in this PR.

For second issue

Coverage report uploading of github action was currently failing.

{'detail': ErrorDetail(string='Unable to locate build via Github Actions API. Please upload with the Codecov repository upload token to resolve issue.', code='not_found')}
404
==> Uploading to Codecov
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100  723k  100   171  100  723k    909  3846k --:--:-- --:--:-- --:--:-- 3847k
    {'detail': ErrorDetail(string='Unable to locate build via Github Actions API. Please upload with the Codecov repository upload token to resolve issue.', code='not_found')}

• (not code) activated lbm-sdk repository of codecov/line
• (not code) registered CODECOV_TOKEN secret on the github repository
• added using CODECOV_TOKEN to github action

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer
• Review Codecov Report in the comment section below once CI passes

[egonspace]

I will merge this with the top commit named chore: rename rest apis.