### What changes were proposed in this pull request?
This is an attempt to adapt Spark REPL to Scala 2.13.
It is based on a [scala-2.13 branch](https://github.com/smarter/spark/tree/scala-2.13) made by smarter.
I had to set Scala version to 2.13 in some places, and to adapt some other modules, before I could start working on the REPL itself. These are separate commits on the branch that probably would be fixed beforehand, and thus dropped before the merge of this PR.
I couldn't find a way to run the initialization code with existing REPL classes in Scala 2.13.2, so I [modified REPL in Scala](e9cc0dd547) to make it work. With this modification I managed to run Spark Shell, along with the units tests passing, which is good news.
The bad news is that it requires an upstream change in Scala, which must be accepted first. I'd be happy to change it if someone points a way to do it differently. If not, I'd propose a PR in Scala to introduce `ILoop.internalReplAutorunCode`.
### Why are the changes needed?
REPL in Scala changed quite a lot, so current version of Spark REPL needed to be adapted.
### Does this PR introduce _any_ user-facing change?
In the previous version of `SparkILoop`, a lot of Scala's `ILoop` code was [overridden and duplicated](2bc7b75537) to make the welcome message a bit more pleasant. In this PR, the message is in a bit different order, but it's still acceptable IMHO.
Before this PR:
```
20/05/15 15:32:39 WARN Utils: Your hostname, hermes resolves to a loopback address: 127.0.1.1; using 192.168.1.28 instead (on interface enp0s31f6)
20/05/15 15:32:39 WARN Utils: Set SPARK_LOCAL_IP if you need to bind to another address
20/05/15 15:32:39 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
20/05/15 15:32:45 WARN Utils: Service 'SparkUI' could not bind on port 4040. Attempting port 4041.
Spark context Web UI available at http://192.168.1.28:4041
Spark context available as 'sc' (master = local[*], app id = local-1589549565502).
Spark session available as 'spark'.
Welcome to
____ __
/ __/__ ___ _____/ /__
_\ \/ _ \/ _ `/ __/ '_/
/___/ .__/\_,_/_/ /_/\_\ version 3.0.1-SNAPSHOT
/_/
Using Scala version 2.12.10 (OpenJDK 64-Bit Server VM, Java 1.8.0_242)
Type in expressions to have them evaluated.
Type :help for more information.
scala>
```
With this PR:
```
20/05/15 15:32:15 WARN Utils: Your hostname, hermes resolves to a loopback address: 127.0.1.1; using 192.168.1.28 instead (on interface enp0s31f6)
20/05/15 15:32:15 WARN Utils: Set SPARK_LOCAL_IP if you need to bind to another address
20/05/15 15:32:15 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
Welcome to
____ __
/ __/__ ___ _____/ /__
_\ \/ _ \/ _ `/ __/ '_/
/___/ .__/\_,_/_/ /_/\_\ version 3.0.0-SNAPSHOT
/_/
Using Scala version 2.13.2-20200422-211118-706ef1b (OpenJDK 64-Bit Server VM, Java 1.8.0_242)
Type in expressions to have them evaluated.
Type :help for more information.
Spark context Web UI available at http://192.168.1.28:4040
Spark context available as 'sc' (master = local[*], app id = local-1589549541259).
Spark session available as 'spark'.
scala>
```
It seems that currently the welcoming message is still an improvement from [the original ticket](https://issues.apache.org/jira/browse/SPARK-24785), albeit in a different order. As a bonus, some fragile code duplication was removed.
### How was this patch tested?
Existing tests pass in `repl`module. The REPL runs in a terminal and the following code executed correctly:
```
scala> spark.range(1000 * 1000 * 1000).count()
val res0: Long = 1000000000
```
Closes#28545 from karolchmist/scala-2.13-repl.
Authored-by: Karol Chmist <info+github@chmist.com>
Signed-off-by: Sean Owen <srowen@gmail.com>
3be552ccc8