Generate VOL tests for h5dump

[mattjala]

Depends on #5761 and #5752. Will be marked ready for review once those are merged

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Important

Add VOL tests for h5dump, update test generation logic, and modify test configurations.

• Tests:
  • Add VOL tests for h5dump in CMakeTests.cmake and CMakeTestsXML.cmake.
  • Modify ADD_H5_TEST macro to support VOL-specific tests and filtering.
  • Add gent_tvms() function in h5dumpgentest.c and h5dumpgentest.h for generating test files.
• Configuration:
  • Update .github/workflows/vol_rest.yml to exclude H5DUMP from certain tests.
  • Add NATIVE_ONLY flag to ADD_H5_TEST macro for native VOL connector tests.
• Functions:
  • Modify write_dset() in h5dumpgentest.c to accept tid_memory parameter for memory datatype.
  • Update gent_fcontents() and gent_fvalues() to use new write_dset() signature.

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