Error verifying `parquet-variant` crate on 55.2.0 with `verify-release-candidate.sh`

[alamb]

Describe the bug

• Found while verifying Release arrow-rs / parquet Minor version 55.2.0 (June 2025) #7394

When running verify-release-candidate.sh with the 55.2.0 release candidate, it failed validation with the parquet-variant crate

To Reproduce

./dev/release/verify-release-candidate.sh 55.2.0 1

Which results in

running 6 tests
test variant_primitive ... FAILED
test variant_array_primitive ... FAILED
test variant_object_empty ... FAILED
test variant_array_builder ... FAILED
test variant_object_primitive ... FAILED
test variant_object_builder ... FAILED

failures:

---- variant_primitive stdout ----

thread 'variant_primitive' panicked at parquet-variant/tests/variant_interop.rs:45:72:
called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }

---- variant_array_primitive stdout ----

thread 'variant_array_primitive' panicked at parquet-variant/tests/variant_interop.rs:45:72:
called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- variant_object_empty stdout ----

thread 'variant_object_empty' panicked at parquet-variant/tests/variant_interop.rs:45:72:
called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }

---- variant_array_builder stdout ----
dictionary_key_start_byte: 3

thread 'variant_array_builder' panicked at parquet-variant/tests/variant_interop.rs:45:72:
called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }

---- variant_object_primitive stdout ----

thread 'variant_object_primitive' panicked at parquet-variant/tests/variant_interop.rs:45:72:
called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }

---- variant_object_builder stdout ----
dictionary_key_start_byte: 10

thread 'variant_object_builder' panicked at parquet-variant/tests/variant_interop.rs:45:72:
called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }


failures:
    variant_array_builder
    variant_array_primitive
    variant_object_builder
    variant_object_empty
    variant_object_primitive
    variant_primitive

test result: FAILED. 0 passed; 6 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

error: test failed, to rerun pass `-p parquet-variant --test variant_interop`

Expected behavior
Tests should pass

Additional context
I am pretty sure this is related to the fact the parquet-testing directory is specified by the PARQUET_TESTING environment variable rather than in the standard location

[alamb]

Here is a PR

• Respect PARQUET_TEST_DATA in variant_interop test #7747