feat: support application names more than 63 chars long

[YGwen]

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
• The title of the PR states what changed and the related issues number (used for the release note).
• I've updated both the CLI and UI to expose my feature, or I plan to submit a second PR with them.
• Optional. My organization is added to USERS.md.
• I've signed the CLA and my build is green (troubleshooting builds).

[CLAassistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

Merging #4051 into master will decrease coverage by 0.09%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4051      +/-   ##
==========================================
- Coverage   42.42%   42.33%   -0.10%     
==========================================
  Files         123      123              
  Lines       18229    18232       +3     
==========================================
- Hits         7734     7718      -16     
- Misses       9493     9516      +23     
+ Partials     1002      998       -4     

Impacted Files	Coverage Δ
util/settings/settings.go	42.56% <100.00%> (+0.26%)	⬆️
controller/appcontroller.go	48.61% <0.00%> (-2.03%)	⬇️

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[jessesuen]

I don't think you'll be able to hash the app name since you lose information about the app name which is required for other purposes. I think the approach that you will need to take, is that we allow the app name to be annotated on the resource instead of labeled.

[drewboswell]

My understanding was that the label was only used for synchronizing purposes though. Have you found places that use the label and expect a match between it and the app name?

[drewboswell]

@jessesuen both @YGwen and I see no reason why this fix would not work. Can you show anything to the contrary?

This seems like a quick-win intermediate solution for longer names.

[sbose78]

This could either be closed or revived to use the new approach?

[vsfedorenko]

I suggest to use <first-48-symbols>-<16 symbols hash> or <first-58-symbols>-<6 chars hash> because otherwise it becomes harder to know what app is behind the name if it consists only of hash.

[alexmt]

Superseded by #7251