This change aligns with the Jakarta API requirements in Spring
Framework.
This commit also upgrades optional dependencies with the latest compatible
versions.
Closes gh-543
Prior to this commit, metrics instrumentation was provided by Spring
Boot, using Micrometer metrics. The `Instrumentation` would publish two
timers and a counter, but would not support tracing.
This commit replaces the former with a dedicated support in Spring for
GraphQL directly. This uses the new `Observation` API from Micrometer
and publishes two observations:
* a request execution observation, with timing and tracing included
* a data fetching observation with the request execution as a parent
observation
Closes gh-501
