revise the #2288

[CyanJoeng]

Description

the revised version of #2288

Fixes # (issue)

• Fix: remove graph option in bcommits
• Feat: add config to control the graph behaviour in commits

How Has This Been Tested?

invoking the function builtin.git_bcommits and builtin.git_commits with configuration

Configuration:

require('telescope').setup{
  defaults = {
    -- Default configuration for telescope goes here:
    -- config_key = value,
    git_log_graph = {show = true, all_branches = true, inverted = false},
  },
}