[AArch64] Fix symbol offset limit (PR 98618)

[AArch64] Fix symbol offset limit (PR 98618)

In aarch64_classify_symbol symbols are allowed large offsets on relocations.
This means the offset can use all of the +/-4GB offset, leaving no offset
available for the symbol itself.  This results in relocation overflow and
link-time errors for simple expressions like &global_array + 0xffffff00.

To avoid this, unless the offset_within_block_p is true, limit the offset
to +/-1MB so that the symbol needs to be within a 3.9GB offset from its
references.  For the tiny code model use a 64KB offset, allowing most of
the 1MB range for code/data between the symbol and its references.

	gcc/
	PR target/98618
	* config/aarch64/aarch64.c (aarch64_classify_symbol):
	Apply reasonable limit to symbol offsets.

	gcc/testsuite/
	PR target/98618
	* gcc.target/aarch64/symbol-range.c: Improve testcase.
	* gcc.target/aarch64/symbol-range-tiny.c: Likewise.

(cherry picked from commit 7d3b27ff12610fde9d6c4b56abc70c6ee9b6b3db)