Revert "lua: allow using moonjit (#10265)"

[wrowe]

Commit Message: Revert "lua: allow using moonjit (#10265)"
Additional Description:

This reverts commit 2c03496.

See thread https://twitter.com/siddhesh_p/status/1308594269502885889?s=20 @siddhesh_p Sep 22
"It ought to generally be easy to revert to the upstream tree since
they're both [moonjit and luajit] (AFAIK) on the 2.1.x branch. I'll be
happy to help with the transition if needed."

This is no longer maintained code, there is no way for envoy project to
assume responsibility, and after many months, no maintainers have
stepped forward. PR's to luajit effort are one appropriate way forward.

Resolves: #13539

With apologies to @iii-i, this appears to be an abandoned solution.

Signed-off-by: William A Rowe Jr wrowe@vmware.com

Risk Level: low-ish (s390x will become unsupported until changes are upstreamed to luajit)
Testing: local+ci
Docs Changes: n/a
Release Notes:

• Drop moonjit support, now an abandoned fork of luajit
  Fixes: Deprecate moonjit forked component of envoy in favor of luajit #13539

[repokitteh-read-only]

CC @envoyproxy/dependency-shepherds: Your approval is needed for changes made to (bazel/.*repos.*\.bzl)|(bazel/dependency_imports\.bzl)|(api/bazel/.*\.bzl)|(.*/requirements\.txt)|(.*\.patch).

🐱

Caused by: #14603 was opened by wrowe.

see: more, trace.

[mattklein123]

Thanks. Can you add a specific release note about dropping support for this? Also, check CI?

/wait

[repokitteh-read-only]

🙀 Error while processing event:

evaluation error
error: context deadline exceeded

🐱

Caused by: #14603 was edited by mattklein123.

see: more, trace.

[wrowe]

I've dropped this, as noted in the issue, to draft status.

We may want to retain the logic for electing a lua engine. The two most frequently updated and actively maintained are the Lua project, and the LuaJIT fork. The forks of LuaJIT I'm researching, but most seem largely inactive. Unfortunately this is a federation of single-maintainer efforts, which isn't conducive to a stable dependency. Until we decide a way forward, I want to park this PR for 3-4 weeks and research where these communities converge and diverge.

[github-actions]

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[github-actions]

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[moderation]

@wrowe can we revive this PR? As per chats with @htuch and @mattklein123 there is consensus with the @envoyproxy/dependency-shepherds that we should remove Moonjit