fix: removed feePurse from test

[tgrecojs]

agoric init currently scaffolds out a project with broken tests. this is a result of #5997 during which support for makeFeePurse and bindDefaultFeePurse has been dropped.

test-contract.js - current (broken)

  const feePurse = E(zoeService).makeFeePurse();
  const zoe = E(zoeService).bindDefaultFeePurse(feePurse);

test-contract.js - proposed in this PR

  const { zoeService: zoe } = makeZoeKit(makeFakeVatAdmin().admin);

if this is approved, then the same change is needed in a handful of other example repositories