Implement Cobertura output option for #9275 (#9325)

### Problem

Implement Cobertura output option for #9275

### Solution

Add new option (`--scoverage-report-output-as-cobertura`) for triggering `CoberturaXmlWriter(...)` method call in `scoverage-report-generator_2.12-0.0.3.jar` to generate Cobertura output

### Result

Generate Cobertura output (`.pants.d/test/junit/_runs/*/*/all/scoverage/reports/xml/cobertura.xml`) 
when `--scoverage-enable-scoverage --scoverage-report-output-as-cobertura` options are provided in pants command.

src/python/pants/backend/jvm/tasks/coverage/scoverage.py

@@ -38,7 +38,7 @@ def scoverage_report_jar(**kwargs):
                 return JarDependency(
                     org="org.pantsbuild",
                     name="scoverage-report-generator_2.12",
-                    rev="0.0.2",
+                    rev="0.0.3",
                     **kwargs,
                 )
 
@@ -69,6 +69,14 @@ def scoverage_report_jar(**kwargs):
                 "filter.",
             )
 
+            register(
+                "--output-as-cobertura",
+                type=bool,
+                default=False,
+                fingerprint=False,
+                help="Export cobertura formats which would allow users to merge with cobertura coverage for java targets.",
+            )
+
         def create(self, settings, targets, execute_java_for_targets):
             """
             :param settings: Generic code coverage settings.
@@ -87,6 +95,7 @@ def create(self, settings, targets, execute_java_for_targets):
 
             opts = Scoverage.Factory.global_instance().get_options()
             target_filters = opts.target_filters
+            output_as_cobertura = opts.output_as_cobertura
             coverage_output_dir = settings.context.options.for_global_scope().pants_distdir
 
             return Scoverage(
@@ -95,6 +104,7 @@ def create(self, settings, targets, execute_java_for_targets):
                 settings,
                 targets,
                 execute_java_for_targets,
+                output_as_cobertura,
                 coverage_output_dir=coverage_output_dir,
             )
 
@@ -105,6 +115,7 @@ def __init__(
         settings,
         targets,
         execute_java_for_targets,
+        output_as_cobertura,
         coverage_output_dir=None,
     ):
         """
@@ -125,6 +136,7 @@ def __init__(
         self._execute_java = functools.partial(execute_java_for_targets, targets)
         self._coverage_force = settings.options.coverage_force
         self._report_path = report_path
+        self._output_as_cobertura = output_as_cobertura
         self._coverage_output_dir = coverage_output_dir
 
     #
@@ -179,6 +191,7 @@ def report(self, output_dir, execution_failed_exception=None):
 
         main = "org.pantsbuild.scoverage.report.ScoverageReport"
         scoverage_cp = self._report_path
+        output_as_cobertura = self._output_as_cobertura
         html_report_path = os.path.join(output_dir, "scoverage", "reports", "html")
         xml_report_path = os.path.join(output_dir, "scoverage", "reports", "xml")
         safe_mkdir(html_report_path, clean=True)
@@ -199,6 +212,9 @@ def report(self, output_dir, execution_failed_exception=None):
             f"{','.join(final_target_dirs)}",
         ]
 
+        if output_as_cobertura:
+            args.append("--outputAsCobertura")
+
         result = self._execute_java(
             classpath=scoverage_cp,
             main=main,

src/python/pants/java/jar/jar_dependency.py

@@ -121,6 +121,7 @@ class JarDependency:
     intransitive: bool
     excludes: Tuple[Exclude, ...]
     base_path: str
+    output_as_cobertura: bool
 
     def __init__(
         self,
@@ -136,6 +137,7 @@ def __init__(
         intransitive: bool = False,
         excludes: Optional[Sequence[Exclude]] = None,
         base_path: Optional[str] = None,
+        output_as_cobertura: bool = False,
     ) -> None:
         self.org = org
         self.base_name = name
@@ -152,6 +154,7 @@ def __init__(
         if os.path.isabs(base_path):
             base_path = os.path.relpath(base_path, get_buildroot())
         self.base_path = base_path
+        self.output_as_cobertura = output_as_cobertura
 
     def __str__(self):
         return "JarDependency({})".format(self.coordinate)