fix: direct []byte write when updating resources

[nekomeowww]

What type of PR is this?

/kind bug

What this PR does / why we need it:

Currently it writes without the help of datatypes.JSON when updating field object:

	updatedResource := map[string]interface{}{
		"owner_uid":        ownerUID,
		"uid":              metaobj.GetUID(),
		"resource_version": metaobj.GetResourceVersion(),
		"object":           buffer.Bytes(),
	}

which will cause the object field to be hex (binary) format when querying with database tools as following:

1. wrapped datatypes.JSON when updating object

Which issue(s) this PR fixes

None.

Special notes for your reviewer

Does this PR introduce a user-facing change?:

NONE

[clusterpedia-bot]

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[Iceber]

LGTM