Closes gh-10750

Closes gh-10679

Closes gh-10679

This commit reverts:

 - 362735c5
 - a6a8195e

Closes gh-10738

See gh-10704

Closes gh-10737

Closes gh-10736

Closes gh-10735

Closes gh-10734

Closes gh-10733

Closes gh-10732

Closes gh-10731

Closes gh-10730

Closes gh-10729

Closes gh-10728

Closes gh-8899

Closes gh-7999

Closes gh-10709

* pr/10700:
  Polish

Closes gh-10700

See gh-10671

Following some changes in the latest snapshot this includes:
- Some updates to oauth2 client auto-config
- Security auto-config no longer relies on GlobalAuthenticationConfigurerAdapter
- Remove reactive security starter

Closes gh-10704

Closes gh-10671

Regardless of whether the web endpoints have been enabled or not,
all endpoints for which beans are created need to be exposed in a
CF environment under /cloudfoundryapplication.

Closes gh-10673

Closes gh-10684

This commit introduces a new mainClassName property on the springBoot
DSL provided by the Gradle plugin. It can be used to explicitly
configure the mainClassName of the default bootRun, bootJar, and
bootWar tasks in a single place. Previously, the only mechanism
provided to do so was the mainClassName property that's only available
when the application plugin has been applied.

Closes gh-10623

Previously, BootRun used the main property to configure the name of
the main class to run while BootJar and BootWar used the mainClass
property. Both were different to the application plugin which provides
a mainClassName project property.

This commit updates BootRun, BootJar, and BootWar to change the name
of the property used to configure the name of the main class to be
mainClassName. This makes the three Boot-specific tasks consistent
with each other, and also aligns them with Gradle's own application
plugin.

Closes gh-10622

Closes gh-10691