chore(deps): update symfony/form requirement from ^7.0 to ^8.0

[dependabot]

Updates the requirements on symfony/form to permit the latest version.

Release notes

Sourced from symfony/form's releases.

v8.0.0

Changelog (symfony/form@v8.0.0-RC3...v8.0.0)

• no significant changes

Changelog

Sourced from symfony/form's changelog.

CHANGELOG

7.3

• Add support for displaying nested options in DebugCommand
• Add support for strings as data for the MoneyType

7.2

• Deprecate the VersionAwareTest trait, use feature detection instead
• Add support for the calendar option in DateType
• Add LazyChoiceLoader and choice_lazy option in ChoiceType for loading and rendering choices on demand
• Use form.post_set_data instead of form.pre_set_data in ResizeFormListener
• Change the priority of DataCollectorListener from 255 to -255

7.1

• Add option separator to ChoiceType to use a custom separator after preferred choices (use the new separator_html option to display the separator text as HTML)
• Deprecate not configuring the default_protocol option of the UrlType, it will default to null in 8.0 (the current default is 'http')
• Add a keep_as_list option to CollectionType
• Add an input option to MoneyType, to be able to cast the transformed value to integer

7.0

• Throw when using DateTime or DateTimeImmutable model data with a different timezone than configured with the model_timezone option in DateType, DateTimeType, and TimeType
• Make the "widget" option of date/time form types default to "single_text"
• Require explicit argument when calling Button/Form::setParent(), ButtonBuilder/FormConfigBuilder::setDataMapper(), TransformationFailedException::setInvalidMessage()

6.4

• Deprecate using DateTime or DateTimeImmutable model data with a different timezone than configured with the model_timezone option in DateType, DateTimeType, and TimeType
• Deprecate PostSetDataEvent::setData(), use PreSetDataEvent::setData() instead
• Deprecate PostSubmitEvent::setData(), use PreSubmitDataEvent::setData() or SubmitDataEvent::setData() instead
• Add duplicate_preferred_choices option in ChoiceType
• Add $duplicatePreferredChoices parameter to ChoiceListFactoryInterface::createView()

6.3

• Don't render seconds for HTML5 date pickers unless "with_seconds" is explicitly set
• Add a placeholder_attr option to ChoiceType
• Deprecate not configuring the "widget" option of date/time form types, it will default to "single_text" in v7

... (truncated)

Commits

• 81dd027 Merge branch '7.4' into 8.0
• 00b8d61 Mark FormFlow as finished if the last step is skipped
• 0df0b0f Merge branch '7.4' into 8.0
• fd1752e Merge branch '7.3' into 7.4
• 5843655 Merge branch '7.4' into 8.0
• a766bc4 [Form][Intl] Allow the developer to choose if he want to include/exclude curr...
• a8f32aa [Form] Fix EnumType choice_label logic for grouped choices
• 91297ea Merge branch '7.4' into 8.0
• 4a374b6 Add FormFlow for multistep forms management
• 8535417 Merge branch '7.4' into 8.0
• Additional commits viewable in compare view

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