Play metadata update and disable controller spans by default #15604
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Part of #14096
Also noticed that 2.6 was creating controller spans without checking the configuration option, so I changed that. I can move it to a separate PR if we want, otherwise I can slap the "breaking change" label on here.
Migration notes
Controller spans emitted by Play MVC 2.6 instrumentation are now disabled by default, but can be re-enabled with the configuration option:
otel.instrumentation.common.experimental.controller-telemetry.enabled=true.