better error for external rules ran with old scalafix-cli version

[bjaglin]

Follows #1530

metaconfig-pprint brought by metaconfig-core 0.10.0 will not be available to external rules when classloaded by an old scalafix-cli version as the runtime scalafix-core and its dependencies are driven by scalafix-cli dependencies, not the rule dependencies.

We obviously have no control over old scalafix-cli versions, but since the reference to the potentially-missing type is from a macro-generated block, this wraps it to provide a more actionable error message.

[bjaglin]

I tested to run a build of simulacrum-scalafix against this PR with a very old scalafix-cli and confirmed the presence of the error message

➜ cs launch --scala-version 2.12 ch.epfl.scala:::scalafix-cli:0.9.13 -M scalafix.cli.Cli -- --tool-classpath /home/brice/.ivy2/local/org.typelevel/simulacrum-scalafix_2.12/0.5.5-SNAPSHOT/jars/simulacrum-scalafix_2.12.jar --rules=ExpandPolymorphicLambdas && echo OK || echo KO
Exception in thread "main" java.util.ServiceConfigurationError: scalafix.v1.Rule: Provider org.typelevel.simulacrum.fix.TypeClassSupport could not be instantiated
	at java.base/java.util.ServiceLoader.fail(ServiceLoader.java:582)
	at java.base/java.util.ServiceLoader$ProviderImpl.newInstance(ServiceLoader.java:804)
	at java.base/java.util.ServiceLoader$ProviderImpl.get(ServiceLoader.java:722)
	at java.base/java.util.ServiceLoader$3.next(ServiceLoader.java:1395)
	at scala.collection.convert.Wrappers$JIteratorWrapper.next(Wrappers.scala:44)
	at scala.collection.Iterator.foreach(Iterator.scala:943)
	at scala.collection.Iterator.foreach$(Iterator.scala:943)
	at scala.collection.AbstractIterator.foreach(Iterator.scala:1431)
	at scala.collection.generic.Growable.$plus$plus$eq(Growable.scala:62)
	at scala.collection.generic.Growable.$plus$plus$eq$(Growable.scala:53)
	at scala.collection.mutable.ListBuffer.$plus$plus$eq(ListBuffer.scala:184)
	at scala.collection.mutable.ListBuffer.$plus$plus$eq(ListBuffer.scala:47)
	at scala.collection.TraversableOnce.to(TraversableOnce.scala:348)
	at scala.collection.TraversableOnce.to$(TraversableOnce.scala:346)
	at scala.collection.AbstractIterator.to(Iterator.scala:1431)
	at scala.collection.TraversableOnce.toList(TraversableOnce.scala:332)
	at scala.collection.TraversableOnce.toList$(TraversableOnce.scala:332)
	at scala.collection.AbstractIterator.toList(Iterator.scala:1431)
	at scalafix.internal.v1.Rules$.all(Rules.scala:101)
	at scalafix.v1.RuleDecoder$$anon$1.<init>(RuleDecoder.scala:99)
	at scalafix.v1.RuleDecoder$.decoder(RuleDecoder.scala:98)
	at scalafix.internal.v1.Args.ruleDecoder(Args.scala:243)
	at scalafix.internal.v1.Args.configuredRules(Args.scala:262)
	at scalafix.internal.v1.Args.$anonfun$validate$1(Args.scala:369)
	at metaconfig.Configured.andThen(Configured.scala:33)
	at scalafix.internal.v1.Args.validate(Args.scala:364)
	at scalafix.internal.v1.MainOps$.run(MainOps.scala:62)
	at scalafix.v1.Main$.run(Main.scala:32)
	at scalafix.v1.Main$.main(Main.scala:23)
	at scalafix.cli.Cli$.main(Cli.scala:9)
	at scalafix.cli.Cli.main(Cli.scala)
Caused by: java.lang.ExceptionInInitializerError
	at org.typelevel.simulacrum.fix.TypeClassSupport.<init>(TypeClassSupport.scala:25)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at java.base/java.util.ServiceLoader$ProviderImpl.newInstance(ServiceLoader.java:780)
	... 29 more
Caused by: java.lang.RuntimeException: Scalafix version 0.9.13 detected. Please upgrade to 0.9.34+51-19a0ea46-SNAPSHOT or later
	at org.typelevel.simulacrum.fix.TypeClassSupportConfig$.liftedTree1$1(TypeClassSupport.scala:17)
	at org.typelevel.simulacrum.fix.TypeClassSupportConfig$.<init>(TypeClassSupport.scala:17)
	at org.typelevel.simulacrum.fix.TypeClassSupportConfig$.<clinit>(TypeClassSupport.scala)
	... 35 more
Caused by: java.lang.NoClassDefFoundError: metaconfig/pprint/TPrintColors
	... 38 more
Caused by: java.lang.ClassNotFoundException: metaconfig.pprint.TPrintColors
	at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:476)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
	... 38 more

[bjaglin]

Unfortunately, sbt-scalfix only keeps the first line of the exception, so this is not useful at all:

sbt:sbt-scalafix> scalafixAll
[error] (scalafixAll) scalafix.sbt.InvalidArgument: scalafix.v1.Rule: Provider org.typelevel.simulacrum.fix.TypeClassSupport could not be instantiated
[error] Total time: 5 s, completed Mar 13, 2022, 12:48:25 AM

Since sbt-scalafix will be updated before any external rule, I guess it's not really a problem. The expected added value of this PR will be on other clients lagging behind.