[BUG] Fix more edge cases when parsing dates in legacy timeParserPolicy

[andygrove]

Describe the bug
Through further fuzzing, I found additional edge cases. We should update the ParseDateTimeSuite tests to use the fuzzer as we fix these.

Mismatch between CPU and GPU for the following rows:

[#672] CPU: [2/3/2
6T56,0002-03-02]
[#672] GPU: [2/3/2
6T56,null]

[#3238] CPU: [4/7/6-9/,0004-07-06]
[#3238] GPU: [4/7/6-9/,null]

Steps/Code to reproduce bug
Test with values generated by FuzzerUtils.generateRandomStrings(Some(" \t\r\n0123456789:-/TZ")).

Expected behavior
CPU and GPU should match.

Environment details (please complete the following information)
N/A

Additional context
N/A

[andygrove]

These values have single-digit year which we already document that we don't support, but we could do additional work to support them.