Merge branch 'js/partial-clone-connectivity-check'

During an initial "git clone --depth=..." partial clone, it is pointless to spend cycles for a large portion of the connectivity check that enumerates and skips promisor objects (which by definition is all objects fetched from the other side). This has been optimized out. * js/partial-clone-connectivity-check: t/perf: add perf script for partial clones clone: do faster object check for partial clones