Mirgate jar dependencies for testing to rules_jvm_external

[meteorcloudy]

Remove checked-in jars used for //src/test/java/... and fetch them with rules_jvm_external instead.

Working towards: #17036

[meteorcloudy]

bazel/src/test/shell/testenv.sh.tmpl

Lines 421 to 433 in a733c5e

	function setup_javatest_common() {
	# TODO(bazel-team): we should use remote repositories.
	mkdir -p third_party
	if [ ! -f third_party/BUILD ]; then
	cat <<EOF >third_party/BUILD
	package(default_visibility = ["//visibility:public"])
	EOF
	fi
	[ -e third_party/junit.jar ] || ln -s ${junit_jar} third_party/junit.jar
	[ -e third_party/hamcrest.jar ] \
	|| ln -s ${hamcrest_jar} third_party/hamcrest.jar
	}

Tests failing because we also use some jars in shell test setup. :(