Filtering on 'true' omitted non-bool values

Allows controlling a broader set of variables than just on/off.

Also make wasm-opt "full" the default

Addresses part of https://github.com/flutter/flutter/issues/125164

Fixes https://github.com/flutter/flutter/issues/125085

This fixes https://github.com/flutter/flutter/issues/124159

Adds the command line argument `--wasm-opt` to optimize the web assembly output.

flutter-tool: enum cleanup

flutter_tools: Flutter Web CLI cleanup

Add omit-type-checks flag for wasm builds

Add support to the flutter tool to compile against the skwasm renderer

flutter tool: log dart2wasm vs dart2js as appropriate during build

Revert "flutter tool: log dart2wasm vs dart2js as appropriate during build"

flutter tool: log dart2wasm vs dart2js as appropriate during build

flutter_tool: add and use WebCompilerConfig

Add tools test for buildWeb compilation