CI: CCache for macOS

[ax3l]

Add environment options to make CCache work better on macOS.

X-ref: https://github.com/ECP-WarpX/WarpX/pull/5007

• [x] Small enough (< few 100s of lines), otherwise it should probably be split into smaller PRs
• [x] Tested (describe the tests in the PR description)
• [ ] Runs on GPU (basic: the code compiles and run well with the new module)
• [x] Contains an automated test (checksum and/or comparison with theory)
• [ ] Documented: all elements (classes and their members, functions, namespaces, etc.) are documented
• [ ] Constified (All that can be const is const)
• [x] Code is clean (no unwanted comments, )
• [ ] Style and code conventions are respected at the bottom of https://github.com/Hi-PACE/hipace
• [x] Proper label and GitHub project, if applicable