speed up import tests, separate slow tests into their own category on CI

[tomholub]

A lot of these are slow maybe because of the manual private key entry (typing) into the textarea - could try to speed that up. For the rest, we could move them onto a separate CI machine to not slow down overal CI time.

decrypt - by entering pass phrase + remember in session -> ℹ run time: 74s
setup - import key - naked - auto-generate a pass phrase -> ℹ run time: 88s
setup - import key - submit - used before -> run time: 87s
setup - import key - naked - choose my own pass phrase -> run time: 87s
setup - import key - naked - auto-generate a pass phrase -> run time: 88s
setup - import key - warning on primary has no secret -> 88s
setup - import key - fix key self signatures -> 89s
setup - import key - submit - offline - retry -> 90s
user@key-manager-no-pub-lookup.flowcrypt.test - do not search pubkeys on EKM: NO_KEY_MANAGER_PUB_LOOKUP -> 96s
user@standardsubdomainfes.test:8001 - uses FES on standard domain -> 87s
settings - change passphrase - current in local storage -> 110s
settings - change passphrase - current in session known -> 103s
settings - change passphrase - current in session unknown -> 91s