OSS-Fuzz: Add new fuzzer/corpus/dict targets datetime processing

Signed-off-by: Arthur Chan <arthur.chan@adalogics.com>

Author: arthurscchan

Modules/_xxtestfuzz/dictionaries/fuzz_datetime.dict

@@ -0,0 +1,33 @@
+# ISO-8601 tokens for date/time/datetime.fromisoformat
+"T"
+"Z"
+"z"
+"+01:00"
+"+01:00:30"
+"-05:30"
+"+0000"
+"+01"
+"2024-01-15"
+"2024-01-15T10:30"
+"2024-01-15 10:30:00"
+"10:30"
+"10:30:00"
+"10:30:00.123456"
+"10:30:00,5"
+".123456"
+",123"
+"24:00"
+"00:00"
+"W"
+"-W"
+"2024-W03-1"
+"2024-W03"
+"2024-021"
+"0001-01-01"
+"9999-12-31"
+"23:59:59.999999"
+"+23:59"
+"-23:59"
+"hh"
+"mm"
+"ss"

Modules/_xxtestfuzz/fuzz_datetime_corpus/date_0

@@ -0,0 +1 @@
+2024-01-15T10:30

Modules/_xxtestfuzz/fuzz_datetime_corpus/date_1

@@ -0,0 +1 @@
+2024-01-15 10:30:00

Modules/_xxtestfuzz/fuzz_datetime_corpus/date_2

@@ -0,0 +1 @@
+2024-01-15T10:30:00.123456

Modules/_xxtestfuzz/fuzz_datetime_corpus/date_3

@@ -0,0 +1 @@
+2024-01-15T10:30:00+01:00

Modules/_xxtestfuzz/fuzz_datetime_corpus/datetime_0

@@ -0,0 +1 @@
+2024-01-15T10:30:00.123456-05:30