Rename Q31 requantization to GEMMLOWP requantization

Q31 is a poor name choice because the new Ruy requantization also use Q31 operations, but may produce different results

PiperOrigin-RevId: 375635669
diff --git a/BUILD.bazel b/BUILD.bazel
index a0899a4..bf234ac 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -521,10 +521,10 @@
     "src/qs8-igemm/gen/4x4-minmax-gemmlowp-scalar.c",
     "src/qs8-requantization/fp32-scalar-lrintf.c",
     "src/qs8-requantization/fp32-scalar-magic.c",
+    "src/qs8-requantization/gemmlowp-scalar.c",
     "src/qs8-requantization/precise-scalar-signed64.c",
     "src/qs8-requantization/precise-scalar-unsigned32.c",
     "src/qs8-requantization/precise-scalar-unsigned64.c",
-    "src/qs8-requantization/q31-scalar.c",
     "src/qs8-vadd/gen/minmax-scalar-x1.c",
     "src/qs8-vadd/gen/minmax-scalar-x2.c",
     "src/qs8-vadd/gen/minmax-scalar-x4.c",
@@ -540,10 +540,10 @@
     "src/qu8-igemm/2x2-minmax-scalar.c",
     "src/qu8-requantization/fp32-scalar-lrintf.c",
     "src/qu8-requantization/fp32-scalar-magic.c",
+    "src/qu8-requantization/gemmlowp-scalar.c",
     "src/qu8-requantization/precise-scalar-signed64.c",
     "src/qu8-requantization/precise-scalar-unsigned32.c",
     "src/qu8-requantization/precise-scalar-unsigned64.c",
-    "src/qu8-requantization/q31-scalar.c",
     "src/qu8-vadd/minmax-scalar.c",
     "src/u8-lut32norm/scalar.c",
     "src/u8-maxpool/9p8x-minmax-scalar-c1.c",
@@ -1427,7 +1427,7 @@
     "src/qs8-igemm/gen/3x4c8-minmax-gemmlowp-wasmsimd-ld64.c",
     "src/qs8-igemm/gen/3x4c8-minmax-gemmlowp-wasmsimd-ld128.c",
     "src/qs8-requantization/fp32-wasmsimd.c",
-    "src/qs8-requantization/q31-wasmsimd.c",
+    "src/qs8-requantization/gemmlowp-wasmsimd.c",
     "src/qs8-vadd/gen/minmax-wasmsimd-x8.c",
     "src/qs8-vadd/gen/minmax-wasmsimd-x16.c",
     "src/qs8-vadd/gen/minmax-wasmsimd-x24.c",
@@ -1437,7 +1437,7 @@
     "src/qs8-vaddc/gen/minmax-wasmsimd-x24.c",
     "src/qs8-vaddc/gen/minmax-wasmsimd-x32.c",
     "src/qu8-requantization/fp32-wasmsimd.c",
-    "src/qu8-requantization/q31-wasmsimd.c",
+    "src/qu8-requantization/gemmlowp-wasmsimd.c",
     "src/x32-fill/wasmsimd.c",
     "src/x32-packx/x4-wasmsimd.c",
     "src/x32-pad/wasmsimd.c",
@@ -1872,8 +1872,8 @@
     "src/qs8-igemm/gen/6x16-minmax-gemmlowp-neon-mlal-lane-prfm.c",
     "src/qs8-igemm/gen/6x16-minmax-gemmlowp-neon-mlal-lane.c",
     "src/qs8-requantization/fp32-neon.c",
+    "src/qs8-requantization/gemmlowp-neon.c",
     "src/qs8-requantization/precise-neon.c",
-    "src/qs8-requantization/q31-neon.c",
     "src/qs8-vadd/gen/minmax-neon-ld64-x8.c",
     "src/qs8-vadd/gen/minmax-neon-ld64-x16.c",
     "src/qs8-vadd/gen/minmax-neon-ld64-x24.c",
@@ -1892,8 +1892,8 @@
     "src/qu8-igemm/4x8-minmax-neon.c",
     "src/qu8-igemm/8x8-minmax-neon.c",
     "src/qu8-requantization/fp32-neon.c",
+    "src/qu8-requantization/gemmlowp-neon.c",
     "src/qu8-requantization/precise-neon.c",
-    "src/qu8-requantization/q31-neon.c",
     "src/qu8-vadd/minmax-neon.c",
     "src/u8-maxpool/9p8x-minmax-neon-c16.c",
     "src/u8-rmax/neon.c",
@@ -2655,7 +2655,7 @@
     "src/qs8-igemm/gen/4x4c2-minmax-gemmlowp-sse2-ld128.c",
     "src/qs8-requantization/fp32-sse2.c",
     "src/qs8-requantization/precise-sse2.c",
-    "src/qs8-requantization/q31-sse2.c",
+    "src/qs8-requantization/gemmlowp-sse2.c",
     "src/qs8-vadd/gen/minmax-sse2-mul16-ld64-x8.c",
     "src/qs8-vadd/gen/minmax-sse2-mul16-ld64-x16.c",
     "src/qs8-vadd/gen/minmax-sse2-mul16-ld64-x24.c",
@@ -2673,8 +2673,8 @@
     "src/qu8-gemm/4x4c2-minmax-sse2.c",
     "src/qu8-igemm/4x4c2-minmax-sse2.c",
     "src/qu8-requantization/fp32-sse2.c",
+    "src/qu8-requantization/gemmlowp-sse2.c",
     "src/qu8-requantization/precise-sse2.c",
-    "src/qu8-requantization/q31-sse2.c",
     "src/qu8-vadd/minmax-sse2.c",
     "src/u8-maxpool/9p8x-minmax-sse2-c16.c",
     "src/u8-rmax/sse2.c",
@@ -2748,10 +2748,10 @@
     "src/qs8-igemm/gen/3x4c8-minmax-gemmlowp-ssse3-ld128.c",
     "src/qs8-igemm/gen/4x4c2-minmax-gemmlowp-ssse3-ld64.c",
     "src/qs8-igemm/gen/4x4c2-minmax-gemmlowp-ssse3-ld128.c",
+    "src/qs8-requantization/gemmlowp-ssse3.c",
     "src/qs8-requantization/precise-ssse3.c",
-    "src/qs8-requantization/q31-ssse3.c",
+    "src/qu8-requantization/gemmlowp-ssse3.c",
     "src/qu8-requantization/precise-ssse3.c",
-    "src/qu8-requantization/q31-ssse3.c",
 ]
 
 SSE41_UKERNELS = [
@@ -2849,8 +2849,8 @@
     "src/qs8-igemm/gen/4x4c2-minmax-gemmlowp-sse41-ld64.c",
     "src/qs8-igemm/gen/4x4c2-minmax-gemmlowp-sse41-ld128.c",
     "src/qs8-requantization/fp32-sse4.c",
+    "src/qs8-requantization/gemmlowp-sse4.c",
     "src/qs8-requantization/precise-sse4.c",
-    "src/qs8-requantization/q31-sse4.c",
     "src/qs8-vadd/gen/minmax-sse41-mul16-ld64-x8.c",
     "src/qs8-vadd/gen/minmax-sse41-mul16-ld64-x16.c",
     "src/qs8-vadd/gen/minmax-sse41-mul16-ld64-x24.c",
@@ -2867,8 +2867,8 @@
     "src/qs8-vaddc/gen/minmax-sse41-mul32-ld32-x16.c",
     "src/qs8-vaddc/gen/minmax-sse41-mul32-ld32-x24.c",
     "src/qs8-vaddc/gen/minmax-sse41-mul32-ld32-x32.c",
+    "src/qu8-requantization/gemmlowp-sse4.c",
     "src/qu8-requantization/precise-sse4.c",
-    "src/qu8-requantization/q31-sse4.c",
 ]
 
 AVX_UKERNELS = [