Rewrite Set retirement date form to DDF/React

[skateman]

Rewriting the angular component to an API-driven DDF/React form. I made some simplifications to the behavior when setting the date for multiple items, it's not loading the old retirement date for a single item selected undeterministically and it's not setting the retirement its warning message for all affected items. However, when editing a single item, this still happens as it should ...

Fixes #6845
Replaces #7441

[h-kataria]

@skateman i am seeing couple of differences/issues between new vs old retirement form

1. when cancelling out from retirement form, flash message is a warning message on new form
   before
   
   after
   

2. Retirement date is not getting saved on new form
   before
   
   after
   
   

3. when I only changed value of Retirement Warning field and press save button, nothing happens on VM retirement screen(no errors and data is not saved either), on Service retirement screen i get a JS error
   before, shows saved values correctly for Retirement Warning
   
   after, value did not get saved on VM retirement for Retirement Warning field
   
   Service Retirement, throws an error when trying to save Retirement Warning field
   

[skateman]

1. when cancelling out from retirement form, flash message is a warning message on new form

That's correct, if you look at other forms, I am just making this consistent...

2. Retirement date is not getting saved on new form

Because it's done asynchronously, you need workers 😉

3. when I only changed value of Retirement Warning field and press save button, nothing happens on VM retirement screen(no errors and data is not saved either), on Service retirement screen i get a JS error

Updated by making the date field required...

[miq-bot]

Checked commit skateman@84d19bf with ruby 2.6.3, rubocop 0.82.0, haml-lint 0.35.0, and yamllint
7 files checked, 2 offenses detected

**

• 💣 💥 🔥 🚒 - Linter/Haml - Linter::Haml STDERR:

warning: parser/current is loading parser/ruby26, which recognizes
warning: 2.6.6-compliant syntax, but you are running 2.6.3.
warning: please see https://github.com/whitequark/parser#compatibility-with-ruby-mri.

• 💣 💥 🔥 🚒 - Linter/Rubocop - Linter::Rubocop STDERR:

/tmp/d20201120-7-1wcvgxb/config/routes.rb: Warning: no department given for MultilineOperationIndentation. Run `rubocop -a --only Migration/DepartmentName` to fix.

[skateman]

@h-kataria updated

[skateman]

@h-kataria can you please retest according to the updates?