fix: add missing license headers

[jasminetMSFT]

This PR will fix the missing license headers mentioned in #314 using the skywalking-eyes fix header tool.
Header check result is shown as follows:

INFO Loading configuration from file: .licenserc.yaml 
INFO Totally checked 410 files, valid: 86, invalid: 5, ignored: 319, fixed: 0 
INFO GITHUB_TOKEN is not set, license-eye won't comment on the pull request 
ERROR the following files don't have a valid license header: 
.github/.codecov.yml
.github/dependabot.yml
.github/workflows/build.yml
.github/workflows/codeql-analysis.yml
registry/remote/url_test.go
ERROR one or more files does not have a valid license header

Signed-off-by: JasmineTang jasminetang@microsoft.com

[shizhMSFT]

LGTM

[codecov-commenter]

Codecov Report

Merging #315 (612735d) into main (21d6ed0) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #315   +/-   ##
=======================================
  Coverage   71.79%   71.79%           
=======================================
  Files          38       38           
  Lines        3584     3584           
=======================================
  Hits         2573     2573           
  Misses        754      754           
  Partials      257      257           

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