Refactoring utils with adding several new ones

src/frostfs_testlib/utils/datetime_utils.py

@@ -0,0 +1,27 @@
+# There is place for date time utils functions
+
+
+def parse_time(value: str) -> int:
+    """Converts time interval in text form into time interval as number of seconds.
+
+    Args:
+        value: time interval as text.
+
+    Returns:
+        Number of seconds in the parsed time interval.
+    """
+    value = value.lower()
+
+    for suffix in ["s", "sec"]:
+        if value.endswith(suffix):
+            return int(value[: -len(suffix)])
+
+    for suffix in ["m", "min"]:
+        if value.endswith(suffix):
+            return int(value[: -len(suffix)]) * 60
+
+    for suffix in ["h", "hr", "hour"]:
+        if value.endswith(suffix):
+            return int(value[: -len(suffix)]) * 60 * 60
+
+    raise ValueError(f"Unknown units in time value '{value}'")