RFR: 7903488: JOL: Upgrade pre-integration workflows

[Aleksey Shipilev]

We need to start testing 21-ea for upcoming release.

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Commit messages:
 - Fix

Changes: https://git.openjdk.org/jol/pull/41/files
 Webrev: https://webrevs.openjdk.org/?repo=jol&pr=41&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903488
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jol/pull/41.diff
  Fetch: git fetch https://git.openjdk.org/jol.git pull/41/head:pull/41

PR: https://git.openjdk.org/jol/pull/41