No matter what level(error, warning, info) issues flutter analyze always return fatal exit code(1). CI/CD environment receive 1(!0). This may leads to e.g. Jenkins Build step 'Execute shell' marked build as failure.
I propose according to AnalysisSeverity level return fatal(1) or success(0) exit code.

* Revert "docs for image disposal (#67066)"

This reverts commit bcb2ac5a.

* Revert "Dispose of images after using them (#66688)"

This reverts commit a7954691.

Fixes https://github.com/flutter/flutter/issues/66569

SkParagraph may calculate slightly different metrics for text layouts

* Dispose of images after using them
Adds ImageInfo.clone, ImageInfo.dispose, and ImageInfo.isCloneOf.
Makes all stateful holders of ui.Image objects properly clone and dispose of them.
Behavior change for ImageStreamCompleter: Removing the last listener after registering at least one listener results in the object being disposed, and new listeners cannot be added, unless a keepAlive handle is created.
Makes all non-stateful holders of ui.Image (i.e. paintImage and RawImage) assert that whoever gave the image to them has not disposed it on them.

* migrate some material files to nullsafety

* fix test_private

* address review comments

* fix private test on windows

* use uri in include entry of analysis_options

572c34356 add checker board for clip_path,clip_rect,clip_rrect,physical_shap_layer (flutter/engine#20997) (#67010)

package:http can throw a ClientException, which the crash reporter must catch or the tool will crash in the crash reporter. 3/4 crash on dev.

Continued gradual rollout - dev is not that much riskier than master but will give much more data

Text test should check that a paragraph's longest line is not greater than the width constraint (#67000)

Running a build command with split debug info and analyze size causes a crash in the snapshot analysis library. Disable the combination of these two flags.

Fixes #66962

* Set DDS port to requested observatory port for test

* Add test for DDS and observatory ports

* Use FakePlatform instead of mock, fix spacing

* Use FakeProcessManager instead of mock

* Fix analyze issue

* Make completer private and add fn for future