Branch protection: Possibility to not use whitelist but allow anyone with write access (#9055)

* Possibility to not use whitelist but allow anyone with write access

* fix existing test

* rename migration function

* Try to give a better name for migration step

* Clear settings if higher level setting is not set

* Move official reviews to db instead of counting approvals each time

* migration

* fix

* fix migration

* fix migration

* Remove NOT NULL from EnableWhitelist as migration isn't possible

* Fix migration, reviews are connected to issues.

* Fix SQL query issues in GetReviewersByPullID.

* Simplify function GetReviewersByIssueID

* Handle reviewers that has been deleted

* Ensure reviews for test is in a well defined order

* Only clear and set official reviews when it is an approve or reject.

integrations/git_test.go

@@ -383,6 +383,7 @@ func doProtectBranch(ctx APITestContext, branch string, userToWhitelist string)
 			req := NewRequestWithValues(t, "POST", fmt.Sprintf("/%s/%s/settings/branches/%s", url.PathEscape(ctx.Username), url.PathEscape(ctx.Reponame), url.PathEscape(branch)), map[string]string{
 				"_csrf":            csrf,
 				"protected":        "on",
+				"enable_push":      "whitelist",
 				"enable_whitelist": "on",
 				"whitelist_users":  strconv.FormatInt(user.ID, 10),
 			})