See gh-14028

The Spring Boot integration is now handled by the Narayana project
itself at https://github.com/snowdrop/narayana-spring-boot

This commit removes our support.

Closes gh-12026

Closes gh-14120

Closes gh-14119

Closes gh-14118

Closes gh-14117

Closes gh-14116

Closes gh-14115

Closes gh-14114

Closes gh-14113

Closes gh-14112

Closes gh-14111

Closes gh-14110

Closes gh-14109

Closes gh-14108

Closes gh-14107

Closes gh-14106

Closes gh-14105

Closes gh-14104

Closes gh-14103

Closes gh-14102

Closes gh-14101

Closes gh-14100

Closes gh-14099

Closes gh-14008

The `shouldHandleFailure` configuration option has been removed from
`DispatcherServlet`.

See gh-13511

Closes gh-14038

Closes gh-14098

Closes gh-14097

Closes gh-14096

Closes gh-14095

Closes gh-14094

Closes gh-14093

Closes gh-14092

Closes gh-14091

Closes gh-14030

This commit reworks 40d8726d as it has introduced an unfortunate side
effect for those who are using a starter with optional starter
dependencies.

`spring-boot-starter-web` defines the json and the tomcat starter. The
latter is part of a set of starters that do not bring the base starter
and the former can be excluded to use gson rather than jackson.

When such arrangement happens, spring-boot-starter-web no longer defines
the base starter (and therefore doesn't bring the core dependencies
that Spring Boot needs to bootstrap).

This commit reviews the starters that define optional starters and
reintroduce the base starter.

Closes gh-14076