This commit adds a new configuration property,
`spring.reactor.context-propagation` that configures the context
propagation mode for Reactor operators. By default the value is set to
"AUTO" for reinstating automatically context values as ThreadLocals
within Reactor operators. The "LIMITED" mode restricts this feature ot
the "tap" and "handle" operators but has a slightly lower footprint.
Closes gh-34201
4da42c09a6