Invalid Test Filter should exit

[RainNapper]

When passing in a test filter that is improperly formed, Flank will throw an exception but will not terminate. When flank is run in CI, this causes unnecessary timeouts while the scripts are waiting for the command to finish.

Example error

	at ftl.filter.TestFilters.parseSingleFilter(TestFilters.kt:100)
	at ftl.filter.TestFilters.access$parseSingleFilter(TestFilters.kt:31)
	at ftl.filter.TestFilters$fromTestTargets$parsedFilters$2.invoke(TestFilters.kt:85)
	at ftl.filter.TestFilters$fromTestTargets$parsedFilters$2.invoke(TestFilters.kt:31)
	at kotlin.sequences.TransformingSequence$iterator$1.next(Sequences.kt:172)
	at kotlin.sequences.SequencesKt___SequencesKt.toCollection(_Sequences.kt:702)
	at kotlin.sequences.SequencesKt___SequencesKt.toMutableList(_Sequences.kt:732)
	at kotlin.sequences.SequencesKt___SequencesKt.toList(_Sequences.kt:723)
	at ftl.filter.TestFilters.fromTestTargets(TestFilters.kt:86)
	at ftl.args.AndroidTestShard.getTestMethods(AndroidTestShard.kt:32)
	at ftl.args.AndroidTestShard.getTestShardChunks(AndroidTestShard.kt:25)
	at ftl.run.AndroidTestRunner$runTests$2.invokeSuspend(AndroidTestRunner.kt:38)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.ResumeModeKt.resumeUninterceptedMode(ResumeMode.kt:45)
	at kotlinx.coroutines.internal.ScopeCoroutine.afterCompletionInternal(Scopes.kt:32)
	at kotlinx.coroutines.JobSupport.completeStateFinalization(JobSupport.kt:311)
	at kotlinx.coroutines.JobSupport.tryFinalizeFinishingState(JobSupport.kt:237)
	at kotlinx.coroutines.JobSupport.tryMakeCompletingSlowPath(JobSupport.kt:851)
	at kotlinx.coroutines.JobSupport.tryMakeCompleting(JobSupport.kt:813)
	at kotlinx.coroutines.JobSupport.makeCompletingOnce$kotlinx_coroutines_core(JobSupport.kt:789)
	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:111)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
	at kotlinx.coroutines.DispatchedTask.run(Dispatched.kt:241)
	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.kt:116)
	at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:79)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:54)
	at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:36)
	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
	at ftl.cli.firebase.test.android.AndroidRunCommand.run(AndroidRunCommand.kt:49)
	at picocli.CommandLine.executeUserObject(CommandLine.java:1687)
	at picocli.CommandLine.access$900(CommandLine.java:146)
	at picocli.CommandLine$RunLast.handle(CommandLine.java:2059)
	at picocli.CommandLine$RunLast.handle(CommandLine.java:2026)
	at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:1893)
	at picocli.CommandLine.execute(CommandLine.java:1822)
	at ftl.Main$Companion.main(Main.kt:41)
	at ftl.Main.main(Main.kt)```

[pawelpasterz]

Closing since #649 is more general and will solve this issue as well.

[RainNapper]

Oops, I had two tabs open, and thought I didn't submit when I did. Sorry about the duplicate.