[lworld] Integrated: Remove 32-bit builds from GH actions

[David Simms]

Valhalla currently do ports

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Commit messages:
 - Comments are not enough
 - Disable 32-bit GH actions for Valhalla

Changes: https://git.openjdk.java.net/valhalla/pull/246/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=246&range=00
  Stats: 99 lines in 1 file changed: 0 ins; 99 del; 0 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/246.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/246/head:pull/246

PR: https://git.openjdk.java.net/valhalla/pull/246