AArch64: Stop saving/restoring x29 in unnecessary cases

[knn-k]

This commit introduces SAVE_LR and RESTORE_LR macros and replaces some of SAVE_FPLR and RESTORE_FPLR.
FP (x29) register is handled by SAVE/RESTORE_PRESERVED_REGS and SAVE_RESTORE_C_NONVOLATILE_REGS.

[knn-k]

Here is the j2iVirtual code, for example. This commit removes str x29, [sp, #648] after stp x28, x29, [x16, #224].

00000000008bbe14 <j2iVirtual>:
  8bbe14:       f9001274        str     x20, [x19, #32]
  8bbe18:       910683f0        add     x16, sp, #0x1a0
  8bbe1c:       f9011bf2        str     x18, [sp, #560]
  8bbe20:       f90127f5        str     x21, [sp, #584]
  8bbe24:       a90b5e16        stp     x22, x23, [x16, #176]
  8bbe28:       a90c6618        stp     x24, x25, [x16, #192]
  8bbe2c:       a90d6e1a        stp     x26, x27, [x16, #208]
  8bbe30:       a90e761c        stp     x28, x29, [x16, #224] <- FP (x29) is saved at x16+232 = sp+648
  8bbe34:       f90147fd        str     x29, [sp, #648] <- This instruction can be removed
  8bbe38:       f9014bfe        str     x30, [sp, #656]
  8bbe3c:       f9007a69        str     x9, [x19, #240]
  8bbe40:       aa0003e1        mov     x1, x0
  8bbe44:       d28001a0        mov     x0, #0xd                        // #13
  8bbe48:       17ffff34        b       8bbb18 <cInterpreterFromJIT>

[0xdaryl]

Code looks good. Minor nit: can you fix the spelling of "unnecessary" in your commit title please?

[0xdaryl]

Jenkins test sanity alinux jdk17

[knn-k]

Fixed the commit title. Re-running the test.

[knn-k]

Jenkins test sanity alinux jdk17