feat: migrations should noop faster

[joshuarli]

currently migrations noop takes ~10 minutes in us and a few minutes each in other regions and customers

i'd like to optimize the noop case by only checking the migrations table before dj_call_command migrate does all the heavy stuff like loading apps and models

getsentry upgrade --verbosity=2 --no-repair --noinput local noop before and after (3 databases - default, secondary, billing):

Executed in   62.95 secs    fish           external
   usr time   61.39 secs    0.18 millis   61.39 secs
   sys time    0.97 secs    3.43 millis    0.96 secs

Executed in    3.46 secs    fish           external
   usr time    2.50 secs    0.24 millis    2.50 secs
   sys time    0.54 secs    4.33 millis    0.54 secs