PR tree-optimization/101390: Vectorize modulo operator

PR tree-optimization/101390: Vectorize modulo operator

This patch adds a new vectorization pattern that detects the modulo
operation where the second operand is a variable.
It replaces the statement by division, multiplication, and subtraction.

The patch was bootstrapped and regtested on aarch64-linux-gnu, no regression.
Ok for mainline?

Signed-off-by: Jennifer Schmitz <jschmitz@nvidia.com>
gcc/
	PR tree-optimization/101390
	* tree-vect-patterns.cc (vect_recog_mod_var_pattern): Add new pattern.

gcc/testsuite/
	PR tree-optimization/101390
	* gcc.dg/vect/vect-mod-var.c: New test.
	* gcc.target/aarch64/sve/mod_1.c: Likewise.
	* lib/target-supports.exp: New selector expression.