Merge branch 'js/adjust-tests-to-explicitly-access-bare-repo'

Merge branch 'js/adjust-tests-to-explicitly-access-bare-repo'

Some tests assume that bare repository accesses are by default
allowed; rewrite some of them to avoid the assumption, rewrite
others to explicitly set safe.bareRepository to allow them.

* js/adjust-tests-to-explicitly-access-bare-repo:
  safe.bareRepository: default to "explicit" with WITH_BREAKING_CHANGES
  status tests: filter `.gitconfig` from status output
  ls-files tests: filter `.gitconfig` from `--others` output
  t5601: restore `.gitconfig` after includeIf test
  t1305: use `--git-dir=.` for bare repo in include cycle test
  t1300: remove global config settings injected by test-lib.sh
  t7900: do not let `$HOME/.gitconfig` interfere with XDG tests
  test-lib: allow bare repository access when breaking changes are enabled