Add many more global analyses. (#47875)

* Update packages.

* Add many more global analyses.

* Catch trailing spaces and trailing newlines in all text files.
  Before we were only checking newly added files, but that means we
  missed some.

* Port the trailing spaces logic to work on Windows too.

* Correct all the files with trailing spaces and newlines.

* Refactor some of the dev/bots logic into a utils.dart library.
  Notably, the "exit" and "print" shims for testing are now usable
  from test.dart, analyze.dart, and run_command.dart.

* Add an "exitWithError" function that prints the red lines and
  then exits. This is the preferred way to exit from test.dart,
  analyze.dart, and run_command.dart.

* More consistency in the output of analyze.dart.

* Refactor analyze.dart to use the _allFiles file enumerating logic
  more widely.

* Add some double-checking logic to the _allFiles logic to catch
  cases where changes to that logic end up catching fewer files
  than expected (helps prevent future false positives).

* Add a check to prevent new binary files from being added to
  the repository. Grandfather in the binaries that we've already
  added.

* Update all the dependencies (needed because we now import crypto in
  dev/bots/analyze.dart).

README.md

@@ -61,7 +61,7 @@ Flutter works with any development tool (or none at all), but includes editor
 plug-ins for both [Visual Studio Code] and [IntelliJ / Android Studio]. Flutter
 provides [thousands of packages][Flutter packages] to speed your development,
 regardless of your target platform. And accessing other native code is easy,
-with support for both [FFI] and [platform-specific APIs][platform channels]. 
+with support for both [FFI] and [platform-specific APIs][platform channels].
 
 Flutter is a fully open source project, and we welcome contributions.
 Information on how to get started can be found at our