feat(viz): add option to add labels to web service

[omer2500]

Problem
There is no option to add labels to the dashboard service (web) specifically
for example, the use case of service mirror the dashboard service to make it accessible in another cluster needs the label:

mirror.linkerd.io/exported: 'true'

Solution
Add option to add labels to dashboard service only

Validation
Run helm templates with couple of use cases to verify it adds new properties while not overwrite others.

I agree to the DCO for all the commits in this PR.

[omer2500]

Hi,

Will be great to get feedback about this :)

thanks

[cratelyn]

Hi,

Will be great to get feedback about this :)

thanks

hi @omer2500! thanks for your patience, our team has been a bit busy getting a few new features out the door, followed by the u.s. holiday last week.

it looks like the first place to start would be to update the helm docs, which are checked into git as a README.md. you should be able to fix that by running helm docs from your branch and checking in any resulting changes.

[omer2500]

Thanks for the fix and the merge @adleong i actually wanted to ask what was wrong on the helm docs it seems just the version was changed? am i missing something ?

[adleong]

@omer2500 that's right, we recently updated the version of our helm tooling.