Improve Dynamic Page Cache header assertions in JSON:API tests

cache contexts whenever it is possible

Closes #3473374

changed title from DRY, autogenerate dnynamic page cache header from to Improve Dynamic Page Cache header assertions in JSON:API tests

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• d96d7229 - DRY, autogenerate dnynamic page cache header from

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mentioned in commit issue/drupal-3278759@c37a8019

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• 866cf298 - Nobody will miss these hardcoded header values. Pun intended.

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mentioned in commit issue/drupal-3278759@e16779ba

mentioned in commit issue/drupal-2998824@01d9ff48

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• 550f0e39 - Apply 2 suggestion(s) to 1 file(s)

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• 200c4769 - Remove todo, document it as limitation

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added 67 commits

• 200c4769...49a3c28e - 61 commits from branch project:11.x
• 7508461d - Introduce generateDynamicPageCacheExpectedHeaderValue
• 9f850235 - DRY, autogenerate dnynamic page cache header from
• c9a48fd8 - Nobody will miss these hardcoded header values. Pun intended.
• 41135ada - Apply 2 suggestion(s) to 1 file(s)
• c8966d1d - Remove todo, document it as limitation
• 91def196 - Additional fixes after rebase

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added 1 commit

• 1df7728d - Additional fixes after rebase

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