Fix tests for imports dumper

Remove local absolute paths from testdata, introduce new testrunner to
support relativization of imports dump.

compiler/testData/cli/jvm/importsProducer.args

@@ -1,4 +0,0 @@
-$TESTDATA_DIR$/importsProducer
--d
-$TEMP_DIR$
--Xoutput-imports=$TESTDATA_DIR$/importsProducerDump.txt

compiler/testData/cli/jvm/importsProducerDump.txt

@@ -1 +0,0 @@
-{"\/home\/dsavvinov\/Repos\/kotlin\/compiler\/testData\/cli\/jvm\/importsProducer\/a\/A1.kt":["import c.JavaC"],"\/home\/dsavvinov\/Repos\/kotlin\/compiler\/testData\/cli\/jvm\/importsProducer\/a\/A2.kt":[],"\/home\/dsavvinov\/Repos\/kotlin\/compiler\/testData\/cli\/jvm\/importsProducer\/b\/B1.kt":["import a.*"],"\/home\/dsavvinov\/Repos\/kotlin\/compiler\/testData\/cli\/jvm\/importsProducer\/b\/nestedB\/B2.kt":["import a.A1 as AliasedA1","import a.A1"],"\/home\/dsavvinov\/Repos\/kotlin\/compiler\/testData\/cli\/jvm\/importsProducer\/c\/C1.kt":["import a.A1","import a.A2","import b.B1.Companion.a2","import b.nestedB.bar","import b.nestedB.foo"]}

compiler/testData/importsProducer/simpleCase/simpleCase.dump

@@ -0,0 +1 @@
+{"$TESTDATA_DIR$\/a\/A1.kt":["import c.JavaC"],"$TESTDATA_DIR$\/a\/A2.kt":[],"$TESTDATA_DIR$\/b\/B1.kt":["import a.*"],"$TESTDATA_DIR$\/b\/nestedB\/B2.kt":["import a.A1 as AliasedA1","import a.A1"],"$TESTDATA_DIR$\/c\/C1.kt":["import a.A1","import a.A2","import b.B1.Companion.a2","import b.nestedB.bar","import b.nestedB.foo"]}