Closes gh-13614

See gh-13614

Co-authored-by: Andy Bell <andyrbell@gmail.com>

Closes gh-13863

* pr/13872:
  Fix OAuth2WebSecurityConfigurationTests

Closes gh-13872

* pr/13871:
  Polish "Use Collection.removeIf() where possible"
  Use Collection.removeIf() where possible

Closes gh-13871

See gh-13871

* pr/13813:
  Polish "Add metric description and base unit to metrics endpoint"
  Add metric description and base unit to metrics endpoint

Closes gh-13813

See gh-13813

* pr/13819:
  Polish "Upgrade to Micrometer 1.0.6"
  Upgrade to Micrometer 1.0.6

Closes gh-13819

See gh-13819

Closes gh-13836

* gh-13818:
  Add null guards for getBeanDefinition() in BeanTypeRegistry

Closes gh-13818

Closes gh-13859

Closes gh-13858

Closes gh-13857

Closes gh-13856

Closes gh-13855

Closes gh-13854

Closes gh-13853

Closes gh-13852

Closes gh-13851

Closes gh-13850

Closes gh-13849

Closes gh-13848

Closes gh-13847