fix: timesyncd.conf missing [Time] section

[colinbruner]

Overall Review of Changes:
Adding the [Time] header to the timesyncd.conf template to allow for the configuration file to be properly parsed by timesyncd daemon.

Issue Fixes:
n/a

Enhancements:
n/a

How has this been tested?:
I tested this locally during a packer build and observed the following via journalctl

$ journalctl -u systemd-timesyncd.service
...
Nov 08 22:28:13 packer-654c02ef-a137-f71d-a70b-47036632b345 systemd[1]: Starting Network Time Synchronization...
Nov 08 22:28:13 packer-654c02ef-a137-f71d-a70b-47036632b345 systemd-timesyncd[286]: /etc/systemd/timesyncd.conf.d/50-timesyncd.conf:5: Assignment outside of section. Ignoring.
Nov 08 22:28:13 packer-654c02ef-a137-f71d-a70b-47036632b345 systemd-timesyncd[286]: /etc/systemd/timesyncd.conf.d/50-timesyncd.conf:8: Assignment outside of section. Ignoring.

# modifying file locally
$ cat /etc/systemd/timesyncd.conf.d/50-timesyncd.conf
## Ansible controlled file
# Added as part of ansible-lockdown CIS baseline
# provided by MindPointGroup LLC

[Time]
NTP=time.nist.gov


FallbackNTP=time-a-g.nist.gov time-b-g.nist.gov time-c-g.nist.gov

# restart systemd-timesyncd service
$ systemctl restart systemd-timesyncd.service

# validating configuration is properly reflected
$ journalctl -u systemd-timesyncd.service
Nov 08 22:34:07 packer-654c02ef-a137-f71d-a70b-47036632b345 systemd[1]: Started Network Time Synchronization.
Nov 08 22:34:07 packer-654c02ef-a137-f71d-a70b-47036632b345 systemd-timesyncd[1133]: Initial synchronization to time server 132.163.97.3:123 (time.nist.gov).

By default the ubtu22cis_time_pool appears to template out as the following. systemd-timesyncd does not parse this well.

NTP=[{'name': 'time.nist.gov', 'options': 'iburst maxsources 4'}]

I've copied the logic from FallbackNTP to also iterate and render NTP servers in the same manner for the NTP directive.

[colinbruner]

I just realized I've duplicated the PR submitted here, oops!

Will go ahead and close this one out in favor of the earlier PR.