action: add unit test coverage check workflow

[adamqqqplay]

1. Introduce make coverage to print coverage in console.
2. Github CI use make coverage-codecov to get coverage info.

[anolis-bot]

@adamqqqplay , a new test job has been submitted. Please wait in patience. The test job url: https://tone.openanolis.cn/ws/nrh4nnio/test_result/68766

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@8671b0a). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1228   +/-   ##
=========================================
  Coverage          ?   41.10%           
=========================================
  Files             ?      126           
  Lines             ?    37332           
  Branches          ?    37332           
=========================================
  Hits              ?    15347           
  Misses            ?    21254           
  Partials          ?      731           

[anolis-bot]

@adamqqqplay , The CI test is completed, please check result:

Test Case		Test Result
build rust golang image		✅ SUCCESS
compile nydusd		✅ SUCCESS
compile ctr remote		✅ SUCCESS
compile nydus snapshotter		✅ SUCCESS
run container with rafs		✅ SUCCESS
run container with zran		✅ SUCCESS
run container with rafs and compile linux		✅ SUCCESS

Congratulations, your test job passed!

[anolis-bot]

@adamqqqplay , the code has been updated, so a new test job has been submitted. Please wait in patience. The test job url: https://tone.openanolis.cn/ws/nrh4nnio/test_result/68807

[anolis-bot]

@adamqqqplay , The CI test is completed, please check result:

Test Case		Test Result
build rust golang image		✅ SUCCESS
compile nydusd		✅ SUCCESS
compile ctr remote		✅ SUCCESS
compile nydus snapshotter		✅ SUCCESS
run container with rafs		✅ SUCCESS
run container with zran		✅ SUCCESS
run container with rafs and compile linux		✅ SUCCESS

Congratulations, your test job passed!