DNS Zone edition is too slow

Requirements

• Filling out the template is required. Any Enhancement request that does not include enough information to be reviewed in a timely manner may be closed at the maintainers' discretion.
• All new code requires tests to ensure against regressions

Descriptive title for this enhancement

Change the behavior of the plugin to improve performances

Actual behavior

When I edit a workstation, DNS entry is updated. I guess it calls back the main plugin that parses all the records of the zone. If 3 minute waiting is still acceptable to modify the whole zone, it is not usable when we want to rename 20 workstations, it's over 1h lost. Definitly not good

Expected behavior

The DNS tab should only get an update related entries (just a A record in this scenario) making modifications instantaneous instead of losing a lot of time

Step by step description of new behaviour

1. Edit a system object
2. Change the name
3. Wait

Benefits

Make the plugin usable in production

Possible Drawbacks

Applicable Issues

assigned to @MCMic

changed milestone to %47

added Silver label

added Bugs label

added PJ1610-0019 label

Related to #5688 (closed)

created branch 5716-system-dns-tab

mentioned in commit 65c4886c

added 2h of time spent

added To Be Tested label

created branch 5716-system-dns-tab

mentioned in commit aa0207bb

mentioned in issue #5688 (closed)

created branch 5716-system-dns-tab

mentioned in commit cb9999d0

added 1h of time spent

created branch 5716-system-dns-tab