[AsmParser] Correctly handle .ifeqs nested in other conditional directives (#132713)

The parser function used for the .ifeqs and .ifnes directives was
missing the check for whether we are currently in an ignored block of an
outer conditional directive, causing the block to be evaluated when it
should not, for example:

.if 0
  .ifeqs "a", "a"
    // Should not be evaluated, but is
    nop
  .endif
.endif