Migrate Edit Environments Form to Vue

What does this MR do?

Re-uses the new form component made as part of the migration of new environments.

There was some question about whether or not we need Vuex or something, but honestly because the form manages such a low number of properties and the validation requirements are so small, that I opted to not use it here instead.

Also the environment model is small, and so can be inlined in a data attribute. As the validation is stricter on the backend, this should be clear of HTML injection.

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Once GraphQL becomes an option here, then it would make a lot of sense to just use Apollo to manage most everything I think.

For #29006 (closed)

Screenshots or Screencasts (strongly suggested)

Does this MR meet the acceptance criteria?

Conformity

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• I have self-reviewed this MR per code review guidelines.
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• This change is backwards compatible across updates, or this does not apply.

Availability and Testing

• I have added/updated tests following the Testing Guide, or it's not needed. (Consider all test levels. See the Test Planning Process.)
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• I have informed the Infrastructure department of a default or new setting change per definition of done, or it's not needed.