RFR: 8305590: Remove nothrow exception specifications from operator new [v3]

[Afshin Zafari]

> - The `throw()` (i.e., no throw) specifications are removed from the instances of `operator new` where _do not_ return `nullptr`.
> 
> - The `-fcheck-new` is removed from the gcc compile flags.
> 
> - The `operator new` and `operator delete` are deleted from `StackObj`.
> 
> - The `GrowableArrayCHeap::operator delete` is added to be matched with its corresponding allocation`AnyObj::operator new`, because gcc complains on that after removing the `-fcheck-new` flag. 
> - The `Thread::operator new`with and without `null` return are removed.
> 
> ### Tests
> local: linux-x64 gtest:GrowableArrayCHeap, macosx-aarch64 hotspot:tier1
> mach5: tiers 1-5

Afshin Zafari has updated the pull request incrementally with one additional commit since the last revision:

  8305590: Remove nothrow exception specifications from operator new

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/13498/files
  - new: https://git.openjdk.org/jdk/pull/13498/files/d2d75e7f..bc0d3069

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13498&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13498&range=01-02

  Stats: 7 lines in 3 files changed: 0 ins; 5 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/13498.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13498/head:pull/13498

PR: https://git.openjdk.org/jdk/pull/13498