Revert "Reland "Add --serve-observatory flag to run, attach, and test (#118402)" (#119529)" (#119729)

This reverts commit 7477d7ac.

* [flutter_tools] Fix parsing of existing DDS URIs from exceptions

Fixes #118609.

* Fix formatting
Co-authored-by: Christopher Fujino <fujino@google.com>

* Fix formatting
Co-authored-by: Christopher Fujino <fujino@google.com>

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Co-authored-by: Christopher Fujino <fujino@google.com>

* Reland "Add --serve-observatory flag to run, attach, and test (#118402)"

This reverts commit 86ab01d2.

* Fix flaky failures

* Fix VM service disappearing failure

This reverts commit 6cd4fa45.

* Remove superfluous words from comments.

* Revert `win32_window.h`

Which seems to come from `gallery`

This flag will allow for Observatory to be served by the VM service once it is disabled by default in the Dart SDK.

* dart fix --apply

* manual fixes

* fix after merge conflicts

* review

* Add macOS to xcodeMissing and xcodeIncomplete

* And unit test

You can now specify a --local-web-sdk flag to point to a wasm_release folder. This will make it so that only artifacts that pertain to the web sdk are overridden to point to the wasm_release folder. Other artifacts (such as impellerc) will pull from the cache, or from the --local-engine path if that is specified.

This also uses precompiled platform kernel files for both ddc and dart2js

* Removes retries from "pub get" and proxies its stdout output

* Fix issue where ErrorHandlingProcessManager does not forward "mode" parameter to backing ProcessManager's "start" method

* Make "pub get" use ProcessStartMode.inheritStdio instead of forwarding bytes to stdout and stderr

* Fix tests

* Remove unused env var

* Add back 'Running "flutter pub get"...' status log

* Fix indent

* Add Pub.test() constructor which lets tests mock stdio

* Suggest Rosetta when x64 binary cannot be run

* validator

* Adjust error message

Revert "[web] Add `--local-web-sdk` flag and use precompiled platform kernels for dart2js and ddc (#114639)" (#115242)

This reverts commit 0e9ee367.

* Dart2JS build step looks for compiled platform binaries.

* Use new locations of platform binaries.

* Added --local-web-sdk command line flag.

* Need to use the matching frontend server when doing ddc stuff.

* Update packages/flutter_tools/lib/src/test/web_test_compiler.dart
Co-authored-by: Mouad Debbar <mouad.debbar@gmail.com>

* Update packages/flutter_tools/lib/src/runner/flutter_command_runner.dart
Co-authored-by: Mouad Debbar <mouad.debbar@gmail.com>

* Formatting issues.

* Need to use URI format for platform dill.

* Fix resident runner tests.

* Fix analysis issue.

* Fix and add unit tests.

* Add some useful comments.

* Refine doc comments for flags.
Co-authored-by: Mouad Debbar <mouad.debbar@gmail.com>

Return ErrorHandlingFileSystem backed objects in ErrorHandlingFileSystem file/directory APIs (#112673)

* Introduce stubbed `exclusive` parameter to `File.create`-overridden method.

This is to soften landing of a breaking change https://github.com/dart-lang/sdk/issues/49647

* Pass URI converter from context to DDS

* Match change that will be merged

* Revert SDK web change

See https://github.com/flutter/flutter/pull/103719