<i18n dev> RFR: 8328037: Test java/util/Formatter/Padding.java has unnecessary high heap requirement after JDK-8326718

[Christoph Langer]

4f336085d1098e7fba7b58f0a73c028179a2a13d ([JDK-8326718](https://bugs.openjdk.org/browse/JDK-8326718)) added a few cases to test java/util/Formatter/Padding.java with huge Strings as arguments. Since all possible argument combinations for the test are stored in one array, nothing can be garbage collected while the test is running and the heap requirement is blown up.

In one of our test pipelines we run tier1 tests with VMs that default to 384M of heap and this is not sufficient any longer.

I'm improving this by splitting the one large @ParameterizedTest into multiple ones. With that, I could run the test successfully in a test VM with 96M of heap, e.g. by modifying `@run junit Padding` to `@run junit/othervm -Xmx96m Padding`

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Commit messages:
 - JDK-8328037

Changes: https://git.openjdk.org/jdk/pull/18264/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18264&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328037
  Stats: 473 lines in 1 file changed: 168 ins; 95 del; 210 mod
  Patch: https://git.openjdk.org/jdk/pull/18264.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18264/head:pull/18264

PR: https://git.openjdk.org/jdk/pull/18264