[jdk17u-dev] RFR: 8299482: Remove metaprogramming/isIntegral.hpp

[George Adams]

prerequisite to bumping googletest to 1.13.0

Applies cleanly other than the deleted file (`src/hotspot/share/metaprogramming/isIntegral.hpp`) containing some extra commits

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Depends on: https://git.openjdk.org/jdk17u-dev/pull/2672

Commit messages:
 - Backport f312c99977635a0c54600016c0814a64f8aff2ef

Changes: https://git.openjdk.org/jdk17u-dev/pull/2676/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2676&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299482
  Stats: 140 lines in 5 files changed: 3 ins; 123 del; 14 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2676.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2676/head:pull/2676

PR: https://git.openjdk.org/jdk17u-dev/pull/2676