test: Test large requests through cockpit-tls as well
test: Test large requests through cockpit-tls as well

Commit 8a0edfbc4afa introduced an integration test for doing large
requests directly to cockpit-ws. Add another pair through cockpit-tls.
Buffer handling in cockpit-tls is totally independent, but let's cover
all bases.

This will still fail on rhel-8-1-distropkg: While cockpit-tls is not
affected by the Gio bug, RHEL 8.1's cockpit does not yet have
cockpit-tls.

Closes #13387
cockpituous/cockpit,moraleslazaro/cockpit,deryni/cockpit,moraleslazaro/cockpit,garrett/cockpit,martinpitt/cockpit,cockpituous/cockpit,cockpituous/cockpit,cockpituous/cockpit,martinpitt/cockpit,martinpitt/cockpit,garrett/cockpit,cockpituous/cockpit,deryni/cockpit,mvollmer/cockpit,mvollmer/cockpit,garrett/cockpit,martinpitt/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,martinpitt/cockpit,garrett/cockpit,deryni/cockpit,cockpit-project/cockpit,deryni/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,cockpituous/cockpit,mvollmer/cockpit,moraleslazaro/cockpit,garrett/cockpit,mvollmer/cockpit,deryni/cockpit,moraleslazaro/cockpit,deryni/cockpit,mvollmer/cockpit,cockpit-project/cockpit,deryni/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit