x86-64: Inline small array copy size for int and long arrays

[a7ehuo]

(1) Inline small array copy size without using rep movs for int array and long array

• If AVX-512 is supported and copy size <= 128 bytes, the inlined copy sequence is used.
• If AVX is supported, the threshold for inlined sequence is 64 bytes instead.
• The enhancement for 32 bit and 64 bit arrays will be reused in the downstream OpenJ9 project for reference arrays.

(2) Refactor char array enhancement implementation to support both rep movsw and rep movsd if the copysize is greater than the supported enhancement threshold.

(3) Add the following options to disable the enhancement

• disableArrayCopyIntArrayInlineSmallSizeWithoutREPMOVS: disable the enhancement for int array

• disableArrayCopyLongArrayInlineSmallSizeWithoutREPMOVS: disable the enhancement for long array

• disableArrayCopyReferenceArrayInlineSmallSizeWithoutREPMOVS: disable the enhancement for reference array, which will be implemented in downstream project OpenJ9.

[a7ehuo]

@0xdaryl May I ask you to review this change? Thank you!

@vijaysun-omr @hzongaro fyi

[0xdaryl]

Jenkins build xlinux,xmac,win,x32linux