[Backport] 8139457: Relax alignment of array elements

[linade]

This pull request backports the following patches:

8139457: Relax alignment of array elements 8327426: RISC-V: Move alignment shim into initialize_header() in C1_MacroAssembler::allocate_array 8331098: [Aarch64] Fix crash in Arrays.equals() intrinsic with -CCP

All applies cleanly. Additionally we fix one typo.

8139457 and 8331098 changes alignment requirement for array headers, and fix one bug that's caused. 8327426 is only there to make the code look more like the lilliput21 branch, so that future lilliput patches apply more easily.

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[mmyxym]

As the commits are clean backports, could you please describe the additional typo change?

[linade]

As the commits are clean backports, could you please describe the additional typo change?

doing a diff with lilliput21 branch reveals this typo

[weixlu]

LGTM