Auto merge of #16537 - KuoE0:add-inline-axis-and-block-axis-for-moz-box-orient, r=KuoE0

Add `inline-axis` and `block-axis` aliases for `-moz-box-orient`.

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This issue is reported at https://bugzilla.mozilla.org/show_bug.cgi?id=1355005.

spec: https://developer.mozilla.org/en-US/docs/Web/CSS/box-orient

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix [Bug 1355005](https://bugzilla.mozilla.org/show_bug.cgi?id=1355005)

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- [X] These changes do not require tests in Gecko.

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