Switch to using Jar Jar Abrams

[eed3si9n]

Jar Jar Links (jarjar) is in-sourced to Jar Jar Abrams (https://github.com/eed3si9n/jarjar-abrams) repository and receives regular maintenance since it's being used as sbt-assembly. I think we should switch to using Jar Jar Ambrams CLI:

1. it's an extension of the original jarjar handling Scala signatures and $-mangling.
2. it wipes out the Zip entry timestamps to 2010-01-01.

Note

The following demonstrates that the Zip entries for Spring Boot Actuator is 2010'ed out.

$ unzip -l bazel-out/darwin_arm64-fastbuild/bin/external/jvm__org_springframework_boot__spring_boot_actuator/spring-boot-actuator-shaded.jar
Archive:  bazel-out/darwin_arm64-fastbuild/bin/external/jvm__org_springframework_boot__spring_boot_actuator/spring-boot-actuator-shaded.jar
  Length      Date    Time    Name
---------  ---------- -----   ----
        0  01-01-2010 00:00   META-INF/

I've also added src/test/bazel:jarjar_test to test this behavior on CI.

Since Jar Jar Abrams CLI is distributed as an uber JAR, we can also get rid of rules_jvm_external, and just download the JAR from Maven Central.

[eed3si9n]

GNU/Linux and macOS (BSD) unzip have different date formats I guess. I can check for 2010, instead of 01-01-2010.

+ cat unzip.txt
Archive:  src/test/bazel/scalding_args__shaded.jar
  Length      Date    Time    Name
---------  ---------- -----   ----
        0  2010-01-01 00:00   META-INF/
        0  2010-01-01 00:00   foo/
      271  2010-01-01 00:00   META-INF/MANIFEST.MF
     6540  2010-01-01 00:00   foo/Args$.class
    17170  2010-01-01 00:00   foo/Args.class
     1603  2010-01-01 00:00   foo/ArgsException$.class
     4257  2010-01-01 00:00   foo/ArgsException.class
     1586  2010-01-01 00:00   foo/Range$.class
     7966  2010-01-01 00:00   foo/Range.class
      6[22](https://github.com/bazeltools/bazel_jar_jar/actions/runs/6409338848/job/17400307738?pr=38#step:5:23)  2010-01-01 00:00   foo/RangedArgs$.class
     [29](https://github.com/bazeltools/bazel_jar_jar/actions/runs/6409338848/job/17400307738?pr=38#step:5:30)89  2010-01-01 00:00   foo/RangedArgs.class
---------                     -------
    4[30](https://github.com/bazeltools/bazel_jar_jar/actions/runs/6409338848/job/17400307738?pr=38#step:5:31)04                     11 files

[johnynek]

definitely seems good to share code that is used by more folks.

thanks @eed3si9n