Add sync runtime spec

[cheyang]

Ⅰ. Describe what this PR does

Ⅱ. Does this pull request fix one issue?

fixes #1967

Ⅲ. List the added test cases (unit test/integration test) if any, please explain if no tests are needed.

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov[bot]]

Codecov Report

Merging #1953 (b8d4246) into master (e31bd8a) will decrease coverage by 0.02%. The diff coverage is 51.41%.

@@            Coverage Diff             @@
##           master    #1953      +/-   ##
==========================================
- Coverage   53.43%   53.41%   -0.03%     
==========================================
  Files         285      290       +5     
  Lines       20481    20654     +173     
==========================================
+ Hits        10944    11032      +88     
- Misses       8358     8428      +70     
- Partials     1179     1194      +15     

Impacted Files	Coverage Δ
pkg/ddc/jindofsx/sync_runtime.go	34.64% <34.64%> (ø)
pkg/ddc/base/syncs.go	46.34% <57.14%> (-1.03%)	:arrow_down:
pkg/ddc/alluxio/sync_runtime.go	100.00% <100.00%> (ø)
pkg/ddc/goosefs/sync_runtime.go	100.00% <100.00%> (ø)
pkg/ddc/jindo/sync_runtime.go	100.00% <100.00%> (ø)
pkg/ddc/juicefs/sync_runtime.go	100.00% <100.00%> (ø)
pkg/utils/resources.go	100.00% <100.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.