[CP] Deprecation message for dartanalyzer command

[mit-mit]

commit(s) to merge: d9b69e9 should be picked into the beta channel

merge instructions: clean merge

What is the issue:

We planned, and announced, that the dartanalyzer command is deprecated in Dart 2.16: #46100

However, there was a mistake in how the deprecation output was added in cr 219702, so the deprecation messages ended up being added to a set of bin files that are only used internally during SDK development, and not in the actual bin/dartanalyzer and bin/dartanalyzer.bat files we ship in the SDK.

The intended output was added to the correct files in cr 229143.

What is the fix: Add simple print statements

Why cherrypick: We already announced the deprecation. If these messages don't go put in 2.16 there is a risk that developers might not realize that this command is deprecated.

Risk: Very low, just adds a print statement.

Link to original issue(s): #46100

/cc @mit-mit @whesse @athomas @vsmenon @devoncarew

[mit-mit]

Confirmed that the fix from cr 229143 works in a downloaded bleeding edge build (https://storage.googleapis.com/dart-archive/channels/be/raw/latest/sdk/dartsdk-macos-x64-release.zip):

$ ~/tmp/dart-sdk/bin/dartanalyzer
Warning: 'dartanalyzer' is deprecated. Please use 'dart analyze'.
Usage: dartanalyzer [options...] <directory or list of files>

And from current beta:

$ ~/dev/flutter/bin/cache/dart-sdk/bin/dartanalyzer --version
dartanalyzer version 2.16.0-134.1.beta
$ ~/dev/flutter/bin/cache/dart-sdk/bin/dartanalyzer
Usage: dartanalyzer [options...] <directory or list of files>

[devoncarew]

From the scrum meeting, this is approved.

[whesse]

Cherry-picked into 2.16.0-134.5.beta.