Revert "puppeteer_tests: Extract out testing changing policies for streams."
Revert "puppeteer_tests: Extract out testing changing policies for streams."

This appears to be failing in CI.

This reverts commit 98ccaceafc8817e1ff5b944dab9d36ffd42978f2.

rht/zulip,zulip/zulip,kou/zulip,punchagan/zulip,hackerkid/zulip,eeshangarg/zulip,eeshangarg/zulip,andersk/zulip,rht/zulip,punchagan/zulip,eeshangarg/zulip,rht/zulip,eeshangarg/zulip,hackerkid/zulip,andersk/zulip,zulip/zulip,andersk/zulip,punchagan/zulip,kou/zulip,kou/zulip,rht/zulip,zulip/zulip,eeshangarg/zulip,eeshangarg/zulip,hackerkid/zulip,andersk/zulip,andersk/zulip,rht/zulip,rht/zulip,punchagan/zulip,punchagan/zulip,zulip/zulip,hackerkid/zulip,eeshangarg/zulip,punchagan/zulip,punchagan/zulip,andersk/zulip,kou/zulip,hackerkid/zulip,hackerkid/zulip,zulip/zulip,zulip/zulip,andersk/zulip,kou/zulip,kou/zulip,hackerkid/zulip,zulip/zulip,kou/zulip,rht/zulip