Send AOT header to server whenever JITServer AOT cache is requested

[cjjdespres]

A client will now send a TR_AOTHeader as part of its VM info whenever the AOT cache as been requested to be used. As we currently only create and enable the deserializer with a local SCC present, this should not change any current behaviour.

The new TR_RelocationRuntime::fillAOTHeader is responsible for filling in a new TR_AOTHeader. Actual allocation of this header is still handled by TR_SharedCacheRelocationRuntime::createAOTHeader.

[cjjdespres]

Attn @mpirvu.

[cjjdespres]

Force-pushed and changed the PR topic slightly because I thought it might be easier to have the entire header-sending change in one merge.

[cjjdespres]

Force-pushed to bring in the latest merges. Shouldn't have changed anything.

[mpirvu]

LGTM

[mpirvu]

jenkins test sanity all jdk21

[mpirvu]

jenkins test sanity plinuxjit,xlinuxjit,zlinuxjit,alinux64jit jdk17

[mpirvu]

jenkins test sanity alinux,alinux64jit jdk17

[mpirvu]

jenkins test sanity alinux,alinux64jit jdk21

[mpirvu]

The failure on ARM was due to infra, so I triggered another round of testing.

20:21:54  Cloning into 'openj9'...
20:21:55  update to openj9 sha: origin/pr/18889/merge
20:21:55  git fetch -q --unshallow
20:22:28  error: pathspec 'origin/pr/18889/merge' did not match any file(s) known to git
20:22:28  SHA not yet found. Continue fetching PR refs and tags...
20:22:28  git fetch -q --tags https://github.com/eclipse-openj9/openj9.git +refs/pull/*:refs/remotes/origin/pr/*
20:22:54  error: RPC failed; curl 92 HTTP/2 stream 0 was not closed cleanly: CANCEL (err 8)
20:22:54  error: 2295 bytes of body are still expected
20:22:54  fetch-pack: unexpected disconnect while reading sideband packet
20:22:54  fatal: early EOF
20:22:54  fatal: fetch-pack: invalid index-pack output

[mpirvu]

The test on aarch64 failed due to infra:

20:21:54  git clone --depth 1 --reference-if-able /home/****/openjdk_cache -b master https://github.com/eclipse-openj9/openj9.git
20:21:54  Cloning into 'openj9'...
20:21:55  update to openj9 sha: origin/pr/18889/merge
20:21:55  git fetch -q --unshallow
20:22:28  error: pathspec 'origin/pr/18889/merge' did not match any file(s) known to git
20:22:28  SHA not yet found. Continue fetching PR refs and tags...
20:22:28  git fetch -q --tags https://github.com/eclipse-openj9/openj9.git +refs/pull/*:refs/remotes/origin/pr/*
20:22:54  error: RPC failed; curl 92 HTTP/2 stream 0 was not closed cleanly: CANCEL (err 8)
20:22:54  error: 2295 bytes of body are still expected
20:22:54  fetch-pack: unexpected disconnect while reading sideband packet
20:22:54  fatal: early EOF
20:22:54  fatal: fetch-pack: invalid index-pack output

Since other tests have passed (including one of aarch64) I am merging this PR.