Make sure the beginning of the cut trace is at or after the cut time

[damhuonglan]

What does this PR do?

When the cut time starts in the middle of a sample the result will start slightly before the cut time.
This fix will make sure the beginning of the cut trace is at or after the cut time.

Relevant Issues?

closes #550

Checklist

• This PR is not directly related to an existing issue (which has no PR yet).
• All tests pass.
• Any new or changed features have are documented.
• Changes have been added to CHANGELOG.txt .
• First time contributors have added your name to CONTRIBUTORS.txt .

[timronan]

Please add a test case and lets merge this.

[hrotman-pic]

@timronan do you think testing against the following experiments is sufficient? I think the behavior is consistent enough that this does not need to be tested against as many experiments as I did for ph5availability PRs but I can test against more in case of surprises.

16-013, Texan, 10 stations
16-015, Fairfield, 1 component of 1 station
19-001, RT130, all components of 1 station on 2 different days
20-003, Fairfield, 1 component of all stations
22-005, SmartSolo, 1 component of all stations
22-024, SmartSolo, 1 component of 9 stations

[hrotman-pic]

Experiments that previously had data starting before 00:00:00 now start after 00:00:00. Ex. 20-003, 16-015, 19-001. Affected dataloggers: Fairfield, RT130.

Unaffected experiments have substantially the same mseed returned on this PR as on the current master branch. Ex. 16-013 (Texan), 22-005, 22-024. Extremely short segments from 22-005 and 22-024 (SmartSolo) are slightly modified, Ex. from 22-024:
Master:
2N|101||DPZ|2022,078,00:00:00.000000|2022,078,23:59:59.995999||250|21600000|||||||2025,038
2N|101||DPZ|2022,078,00:00:00.000000|2022,078,00:00:00.188000||250|48|||||||2025,038

This PR:
2N|101||DPZ|2022,078,00:00:00.000000|2022,078,23:59:59.995999||250|21600000|||||||2025,038
2N|101||DPZ|2022,078,00:00:00.003999|2022,078,00:00:00.187999||250|47|||||||2025,038
However, this is not a substantive change to the 00:00:00 to 23:59:59 data requested and the returned data still meet the criteria of starting at or after the request start time of 00:00:00.