[PATCH] ci: make perforce installation optional in macOS

["Carlo Marcelo Arenas Belón" <carenas@gmail.com>]

Using brew to install perforce has several documented[1,2,3,4] edge
cases that make it fail periodically, so if problems were found while
installing it, just continue without it.

This means that until the problem is solved all perforce tests will be
skipped in macOS, but they are still most likely covered by the other
unaffected runs and will be covered again once the issue solves itself.

1 0eb3671ed96 (ci(osx): use new location of the `perforce` cask, 2019-10-23)
2 5ed9fc3fc86 (ci: prevent `perforce` from being quarantined, 2020-02-27)
3 3831132ace6 (ci/install-depends: attempt to fix "brew cask" stuff, 2021-01-14)
4 https://lore.kernel.org/git/cover-0.2-00000000000-20220421T124225Z-avarab@gmail.com/
---
This is based on master and can merge upwards except with seen where it
conflicts with the recently added ab/ci-osx-loosen-package-requirement
which it is meant to replace.

A successful sample run when merged with master available in :

  https://github.com/carenas/git/actions/runs/2204519374

 ci/install-dependencies.sh | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)
wi
diff --git a/ci/install-dependencies.sh b/ci/install-dependencies.sh
index dbcebad2fb2..53da1afd9f3 100755
--- a/ci/install-dependencies.sh
+++ b/ci/install-dependencies.sh
@@ -43,7 +43,7 @@ macos-latest)
 		git -C "$cask_repo" pull --no-stat --ff-only &&
 		brew install --cask --no-quarantine perforce
 	} ||
-	brew install homebrew/cask/perforce
+	brew install homebrew/cask/perforce || true
 
 	if test -n "$CC_PACKAGE"
 	then
-- 
2.36.0.266.g59f845bde02