On CI, Cassandra running inside the Docker container sometimes fails
to start or the start times out. This has nothing to do with Boot so
we  attempt to protect our tests from the flakiness of the container
by allowing 3 startup attempts.

Closes gh-11757

Closes gh-11666

Closes gh-11673

Rename `spring-boot-deprecated-properties-support` to
`spring-boot-properties-migrator`.

See gh-11301

* pr/11744:
  Polish "Add support for anonymousReadOnly in LdapProperties"
  Add support for anonymousReadOnly in LdapProperties
  Move tests to use ApplicationContextRunner

Closes gh-11744

See gh-11744

This commit adds InvalidEndpointRequestException as a technology
agnostic way to signal that an endpoint request is invalid. When such
exception is thrown, the web layer translates that to a 400.

Rather than overriding the reason, this commit makes sure to reuse the
error infrastructure.

Closes gh-10618

Closes gh-11714

Closes gh-11503

Closes gh-11746

Closes gh-11520

Closes gh-11572

* pr/11680:
  Replace string arguments with char

Optimize method calls by replacing single character String arguments
with char.

Closes gh-11680

* pr/11720:
  Polish

Closes gh-11720

* pr/11743:
  Narrow scope of some variables

Closes gh-11743

* pr/11724:
  Polish

Closes gh-11724

Rename `spring-boot-configuration-analyzer` to
`spring-boot-deprecated-properties-support`.

Also renamed classes to match and polished some of the code.

See gh-11301

See gh-11727

Closes gh-11741

Closes gh-11740

Closes gh-11739

Closes gh-11738

Closes gh-11737

Closes gh-11736