[testers] Deprecate everything the testers package (backport #4742) (#4743)

* [testers] Deprecate everything the testers package (#4742)

Deprecate `BasicTester` and `TesterDriver`.  These have been fully
replaced with ChiselSim.

Signed-off-by: Schuyler Eldridge <[email protected]>
(cherry picked from commit 0a0fa80)

# Conflicts:
#	src/test/scala/chiselTests/TesterDriverSpec.scala

* fixup! [testers] Deprecate everything the testers package (#4742)

* fixup! [testers] Deprecate everything the testers package (#4742)

---------

Co-authored-by: Schuyler Eldridge <[email protected]>

Author: chiselbot

build.sbt

@@ -78,7 +78,9 @@ lazy val warningSuppression = Seq(
     "cat=deprecation&origin=chisel3\\.aop\\.Aspect$:s",
     "cat=deprecation&origin=chisel3\\.stage\\.phases.AspectPhase:s",
     "cat=deprecation&origin=chisel3\\.stage\\.phases.MaybeAspectPhase:s",
-    "cat=deprecation&origin=chisel3\\.InstanceId:s"
+    "cat=deprecation&origin=chisel3\\.InstanceId:s",
+    "cat=deprecation&origin=chisel3\\.testers\\.BasicTester:s",
+    "cat=deprecation&origin=chisel3\\.testers\\.TesterDriver:s"
   ).mkString(",")
 )
 

src/main/scala/chisel3/testers/BasicTester.scala

@@ -9,6 +9,7 @@ import chisel3.internal.Builder.pushCommand
 import chisel3.internal.firrtl._
 import chisel3.experimental.SourceInfo
 
+@deprecated("Use a `Module` instead of `BasicTester`", "Chisel 6.7.0")
 class BasicTester extends Module() {
   // The testbench has no IOs, rather it should communicate using printf, assert, and stop.
   val io = IO(new Bundle() {})

src/main/scala/chisel3/testers/TesterDriver.scala

@@ -16,6 +16,7 @@ import scala.annotation.nowarn
 import scala.sys.process.ProcessLogger
 
 @nowarn("msg=trait BackendCompilationUtilities in package chisel3 is deprecated")
+@deprecated("Please migrate to ChiselSim APIs", "Chisel 6.7.0")
 object TesterDriver extends BackendCompilationUtilities {
   //TODO: need to remove BackendCompilationUtilities here but it will break external API
   //      unless all methods of it are implemented

src/test/scala/chiselTests/TesterDriverSpec.scala

@@ -4,12 +4,16 @@ package chiselTests
 
 import chisel3._
 import chisel3.testers.BasicTester
-import chisel3.util._
+import chisel3.util.Counter
+import org.scalatest.flatspec.AnyFlatSpec
+import org.scalatest.matchers.should.Matchers
+import scala.annotation.nowarn
 
 /** Extend BasicTester with a simple circuit and finish method.  TesterDriver will call the
   * finish method after the FinishTester's constructor has completed, which will alter the
   * circuit after the constructor has finished.
   */
+@nowarn("msg=class BasicTester in package testers is deprecated")
 class FinishTester extends BasicTester {
   val test_wire_width = 2
   val test_wire_override_value = 3