This reverts commit 6153bbef.

[flutter_tools] [iOS] Change UIViewControllerBasedStatusBarAppearance to true to fix rotation status bar disappear in portrait (#92647)

Revert "Reland "Enable caching of CPU samples collected at application startup (#89600)" (#92220)" (#92235)

This reverts commit ba0321e9.

This reverts commit dc7fea8d.

This reverts commit 1d9edde0.

This reverts commit 5fd259be.

This reverts commit cb378edc.

This modifies the flutter update-packages and flutter update-packages --force-upgrade commands so that the many invocations of "dart pub get" in each repo project run in parallel instead of in series.

Offline pub assumes that the pub cache contains all needed packages.  Running
"flutter create" in online mode first will ensure that the pub cache is populated.

Fixes https://github.com/flutter/flutter/issues/89759

* Use `dart __deprecated_pub` instead of `pub` to invoke pub from tools

The top level `pub` commmand has been deprecated and will print
a message. It is however implemented via the __deprecated_pub command
that prints no message.

This reverts commit 7c24ff2c.

Top level `pub` is being deprecated.