auth: Add email_data option to github_oauth2_test.
auth: Add email_data option to github_oauth2_test.

Removes email_not_verified option. That option was used to assign
email_data a different set of emails for a test. Instead of that,
this refactor allows to specify the email_data itself in the function
which calls github_oauth2_test. Flags like email_not_verified are
generally used in one test. This is a preparatory refactor for
choose email screen which may have introduced multiple flags otherwise.

brainwane/zulip,kou/zulip,timabbott/zulip,brainwane/zulip,showell/zulip,synicalsyntax/zulip,rishig/zulip,tommyip/zulip,hackerkid/zulip,rishig/zulip,zulip/zulip,eeshangarg/zulip,rht/zulip,dhcrzf/zulip,hackerkid/zulip,showell/zulip,rht/zulip,synicalsyntax/zulip,andersk/zulip,synicalsyntax/zulip,eeshangarg/zulip,brainwane/zulip,andersk/zulip,punchagan/zulip,zulip/zulip,dhcrzf/zulip,rht/zulip,dhcrzf/zulip,punchagan/zulip,rishig/zulip,rht/zulip,hackerkid/zulip,timabbott/zulip,punchagan/zulip,shubhamdhama/zulip,showell/zulip,zulip/zulip,showell/zulip,rishig/zulip,andersk/zulip,timabbott/zulip,dhcrzf/zulip,shubhamdhama/zulip,eeshangarg/zulip,hackerkid/zulip,timabbott/zulip,eeshangarg/zulip,jackrzhang/zulip,rishig/zulip,zulip/zulip,jackrzhang/zulip,brainwane/zulip,kou/zulip,dhcrzf/zulip,timabbott/zulip,shubhamdhama/zulip,eeshangarg/zulip,showell/zulip,dhcrzf/zulip,jackrzhang/zulip,punchagan/zulip,andersk/zulip,kou/zulip,tommyip/zulip,andersk/zulip,rht/zulip,punchagan/zulip,rishig/zulip,kou/zulip,kou/zulip,tommyip/zulip,rht/zulip,hackerkid/zulip,dhcrzf/zulip,timabbott/zulip,shubhamdhama/zulip,kou/zulip,jackrzhang/zulip,zulip/zulip,kou/zulip,andersk/zulip,shubhamdhama/zulip,hackerkid/zulip,eeshangarg/zulip,tommyip/zulip,jackrzhang/zulip,synicalsyntax/zulip,brainwane/zulip,tommyip/zulip,jackrzhang/zulip,rht/zulip,zulip/zulip,zulip/zulip,jackrzhang/zulip,tommyip/zulip,brainwane/zulip,tommyip/zulip,eeshangarg/zulip,showell/zulip,rishig/zulip,timabbott/zulip,shubhamdhama/zulip,shubhamdhama/zulip,synicalsyntax/zulip,synicalsyntax/zulip,hackerkid/zulip,showell/zulip,andersk/zulip,synicalsyntax/zulip,punchagan/zulip,brainwane/zulip,punchagan/zulip