RFR: 8342917: GHA: Intermittent build failure on Linux while downloading ant

[Kevin Rushforth]

We are getting frequent intermittent failures downloading `ant` on Linux. The fix is to use the package manager to install ant rather than downloading it from `apache.org`.

This only impacts GHA test builds, so the only verification needed for this fix is that the GHA build passes on all platforms.

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Commit messages:
 - Merge remote-tracking branch 'upstream/master' into 8342917-gha-linux-ant
 - Missed updating PATH in one place
 - 8342917: GHA: Intermittent build failure on Linux while downloading ant

Changes: https://git.openjdk.org/jfx/pull/1623/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1623&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8342917
  Stats: 14 lines in 1 file changed: 3 ins; 0 del; 11 mod
  Patch: https://git.openjdk.org/jfx/pull/1623.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1623/head:pull/1623

PR: https://git.openjdk.org/jfx/pull/1623