[8.15] [DOCS][Known issue] Reporting failing in >= 8.15 when using server.protocol: http2 (#230894)

[nastasha-solomon]

Backport

This will backport the following commits from 8.19 to 8.15:

• [DOCS][Known issue] Reporting failing in >= 8.15 when using server.protocol: http2 (#230894)

Questions ?

Please refer to the Backport tool documentation

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CI was triggered for this PR, but this PR targets 8.15 which should not receive a future release. CI is not supported for these branches. Please consult the release schedule, or contact #kibana-operations if you believe this is an error.

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