eslintrc: Move global exemptions to an override.
eslintrc: Move global exemptions to an override.

We don’t want our globals leaking into @zulip/shared.

Signed-off-by: Anders Kaseorg <dfdb7392591db597bc41cf266a9c3bc12a2706e5@zulipchat.com>

rht/zulip,eeshangarg/zulip,showell/zulip,shubhamdhama/zulip,rht/zulip,timabbott/zulip,hackerkid/zulip,timabbott/zulip,kou/zulip,shubhamdhama/zulip,andersk/zulip,eeshangarg/zulip,eeshangarg/zulip,hackerkid/zulip,punchagan/zulip,brainwane/zulip,synicalsyntax/zulip,showell/zulip,brainwane/zulip,synicalsyntax/zulip,timabbott/zulip,zulip/zulip,eeshangarg/zulip,synicalsyntax/zulip,rht/zulip,rht/zulip,eeshangarg/zulip,shubhamdhama/zulip,shubhamdhama/zulip,andersk/zulip,brainwane/zulip,brainwane/zulip,kou/zulip,shubhamdhama/zulip,synicalsyntax/zulip,andersk/zulip,punchagan/zulip,zulip/zulip,kou/zulip,brainwane/zulip,kou/zulip,showell/zulip,punchagan/zulip,andersk/zulip,brainwane/zulip,andersk/zulip,timabbott/zulip,kou/zulip,kou/zulip,timabbott/zulip,zulip/zulip,punchagan/zulip,hackerkid/zulip,eeshangarg/zulip,andersk/zulip,zulip/zulip,timabbott/zulip,timabbott/zulip,hackerkid/zulip,showell/zulip,rht/zulip,shubhamdhama/zulip,showell/zulip,andersk/zulip,brainwane/zulip,zulip/zulip,rht/zulip,showell/zulip,shubhamdhama/zulip,punchagan/zulip,zulip/zulip,eeshangarg/zulip,hackerkid/zulip,hackerkid/zulip,synicalsyntax/zulip,punchagan/zulip,rht/zulip,punchagan/zulip,zulip/zulip,hackerkid/zulip,synicalsyntax/zulip,kou/zulip,showell/zulip,synicalsyntax/zulip