Remove the physical infra provider change password feature

[skateman]

Fixes #6856

[mzazrivec]

@skateman The CI failures seem related.

[miq-bot]

Checked commit skateman@f0006ca with ruby 2.6.3, rubocop 0.82.0, haml-lint 0.35.0, and yamllint
7 files checked, 1 offense detected

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• 💣 💥 🔥 🚒 - 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.