fixes https://github.com/flutter/flutter/issues/120405

Revert "[flutter_tools] Remove sound null safety flag (#123031)"

[flutter_tools] Remove sound null safety flag #2

This reverts commit 7c3088cf.

[flutter_tools] Remove sound null safety flag

[flutter_tools] Clean up `boolArgDeprecated` and `stringArgDeprecated`

fix devtool instructional messages after `flutter build ... --analyze-size `.  Fixes #122229 (#122230)

fix devtool instructional messages after `flutter build ... --analyze-size `.  Fixes #122229

* [tools]some ui polish for build ipa validation

* do not print out a few success validations

* rename installed type to success for more general usage

* forgot nit after reverting custom validation types and re-use doctor types

* [tools]build IPA validation bundle identifier using default com.example

* rephrase the warning

* [tools]build ipa validate launch image using template files

* reuse more code by sharing the same file key

* fix space

* [tools]build ipa validate icon size

* add more checks in case apple change the format, and also add device lab tests

* do not depend on collection package

* [tools]build ipa validate template icon files

* use the same box for both validations, and added some unit test, and some nits

* add unit test for templateImageDirectory

* use fs.path.join intead of raw path

* use the correct filesystem

* lint

* use absolute path for flutter_template_images

* fix rebase

* update indentation

* update flutter build command

* update tests

* fix analyze suggestions

This reverts commit e6300da2.

Revert "Export an IPA for distribution via "flutter build ipa" without --export-options-plist" (#97616)

This reverts commit 5fd259be.

This reverts commit 84e57678.