disable metadata auto-sync for ThinRuntime by default

[TrafalgarZZZ]

Ⅰ. Describe what this PR does

Code changes in this PR:

• disable metadata auto-sync for ThinRuntime by default
• update crd to remove // +kubebuilder:default=true for spec.management.metadataSyncPolicy.autoSync.
  • NOTE: The removal is backward compatible because we take an empty metadataSyncPolicy.autoSync as truew before.

func (msb *MetadataSyncPolicy) AutoSyncEnabled() bool {
	return msb.AutoSync == nil || *msb.AutoSync
}

Ⅱ. Does this pull request fix one issue?

fixes #4282

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

Related to #4091 where we allow users to disable metadata auto-sync, while this PR make it a default behavior.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.94%. Comparing base (90340fc) to head (998feda).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4281      +/-   ##
==========================================
- Coverage   63.20%   62.94%   -0.27%     
==========================================
  Files         482      482              
  Lines       28532    28542      +10     
==========================================
- Hits        18035    17966      -69     
- Misses       8292     8372      +80     
+ Partials     2205     2204       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[TrafalgarZZZ]

/test fluid-e2e

[cheyang]

/lgtm
/approve

[TrafalgarZZZ]

/override codecov/project

[fluid-e2e-bot]

@TrafalgarZZZ: cannot create prow-override CheckRun {0 998feda completed success {Prow override - codecov/project Prow has received override command for the codecov/project checkrun. 0 [] []} codecov/project {0 [] } {0 { 0 {false false false false false} } []} []}

In response to this:

/override codecov/project

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[TrafalgarZZZ]

/lgtm
/approve

[fluid-e2e-bot]

@TrafalgarZZZ: you cannot LGTM your own PR.

In response to this:

/lgtm
/approve

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[fluid-e2e-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cheyang, TrafalgarZZZ

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [TrafalgarZZZ,cheyang]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment