valgrind: remove most hidden tests for arm64

An earlier version of valgrind fixed the defunct processes bug, so those
tests that were skipped specifically for arm can pass now in master,
kirkstone, honister, hardknott, and dunfell.

Detailed test result with remove-for-aarch64 skipped on qemuarm64:

    Commit           Pass   Fail    Skip
    master           624    9       21
    kirkstone        618    10      20
    honister         616    10      19
    hardknott        609    13      18
    dunfell          598    16      17
    zeus             Out of memory: Killed (with many defunct processes)

There are now only 12 skipped by remove-for-aarch64 because 9 fail on
qemuarm64 and 3 more fail on raspberry pi. These are tracked by:
    https://bugzilla.yoctoproject.org/show_bug.cgi?id=14960



Signed-off-by: Zheng Qiu <zheng.qiu@windriver.com>
Signed-off-by: Randy MacLeod <randy.macleod@windriver.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
(cherry picked from commit cbeb9418)
Signed-off-by: Steve Sakoman <steve@sakoman.com>