The patch introduce flags in module "misc" with support status
for sysprof and memprof: `misc.sysprof.enabled` and
`misc.memprof.enabled`. Both flags are boolean and always
available on platforms supported by profilers (Windows is not
supported).

Closes tarantool/tarantool#12215
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Issue: https://github.com/tarantool/tarantool/issues/12215

Branch: https://github.com/tarantool/luajit/tree/ligurio/gh-12215-profilers-flags