Reland "[lldb][test] Re-enable bounds safety tests"

[Michael137]

Reverts #9970

The tests were failing on Linux due to a missing header and missing __unsafe_forge_ casts.

This patch re-enables the tests and fixes the failures on Linux.

[Michael137]

@swift-ci test

[rapidsna]

Looks like a test is failing in macOS.

AssertionError: Ran command:
"expr array_of_bounds_safety_pointers"

Got output:
(int *__bidi_indexable[2]) $0 = {
[0] = (ptr: 0x6000036e8010, bounds: 0x6000036e8010..0x6000036e8020)
[1] = (out-of-bounds ptr: 0x000000000000..0x000000000004, bounds: 0x000000000000..0x000000000000)
}

Expecting regex pattern: "[0] = (out-of-bounds ptr: 0x000000000000..0x000000000004, bounds: 0x000000000000..0x000000000000)" (was not found)

[Michael137]

Looks like a test is failing in macOS.

AssertionError: Ran command: "expr array_of_bounds_safety_pointers"

Got output: (int *__bidi_indexable[2]) $0 = { [0] = (ptr: 0x6000036e8010, bounds: 0x6000036e8010..0x6000036e8020) [1] = (out-of-bounds ptr: 0x000000000000..0x000000000004, bounds: 0x000000000000..0x000000000000) }

Expecting regex pattern: "[0] = (out-of-bounds ptr: 0x000000000000..0x000000000004, bounds: 0x000000000000..0x000000000000)" (was not found)

This was caused by the breakpoint not being set at the right place after i wrapped the malloc with a bounds-safety cast. Fixed in the latest version

[Michael137]

@swift-ci test