Merge branch 'ab/retire-advice-config'

Code clean up to migrate callers from older advice_config[] based
API to newer advice_if_enabled() and advice_enabled() API.

* ab/retire-advice-config:
  advice: move advice.graftFileDeprecated squashing to commit.[ch]
  advice: remove use of global advice_add_embedded_repo
  advice: remove read uses of most global `advice_` variables
  advice: add enum variants for missing advice variables

diff --cc advice.c
Simple merge

diff --cc advice.h
Simple merge

diff --cc builtin/add.c
Simple merge

diff --cc builtin/checkout.c
Simple merge

diff --cc builtin/clone.c
Simple merge

diff --cc builtin/commit.c
Simple merge

diff --cc builtin/fetch.c
Simple merge

diff --cc builtin/merge.c
Simple merge

diff --cc run-command.c
Simple merge

diff --cc sequencer.c
Simple merge

diff --cc unpack-trees.c
Simple merge