[SecurityBundle] Move format-dependent tests from SecurityExtensionTest
merged branch unkind/security-bundle-tests-restructuring (PR #8840)

This PR was squashed before being merged into the 2.2 branch (closes #8840).

Discussion
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[SecurityBundle] Move format-dependent tests from SecurityExtensionTest

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | —
| License       | MIT
| Doc PR        | —

This PR solves issue with tests in the SecurityBundle: current structure of tests force to repeat the same test case for every format (PHP, XML, YAML) even if it doesn't depend on them (see #8782).

Commits
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d463e25 [SecurityBundle] Move format-dependent tests from SecurityExtensionTest