fix errors and add tets for xml deserialization

[GuoAi]

For XML deserialization:

1. For xsdToPure.pure, extend the constraint name with class name to resolve constraint name conflict during inheritance
2. Support multiplicity check
3. Fix the issues with the AllTypes test (i.e., Enum with full path, Date type, empty collection initialization)
4. Add XSD metamodel diagrams
5. Fix issues when query has fewer attributes than input XML data

[github-actions]

Test Results

     684 files  +     684       684 suites  +684   1h 0m 34s ⏱️ + 1h 0m 34s
11 271 tests +11 271  10 893 ✔️ +10 893  378 💤 +378  0 ❌ ±0 
14 062 runs  +14 062  13 600 ✔️ +13 600  462 💤 +462  0 ❌ ±0 

Results for commit ad06bed. ± Comparison against base commit 8205951.

♻️ This comment has been updated with latest results.

[hardikmaheshwari]

/easycla