std: remove names from incorrectly named tests

Tests that only reference decls for the purpose of analyzing more tests
should be unnamed, otherwise trying to filter for just a referenced test
can become impossible depending on the names.

lib/std/Thread.zig

@@ -1141,7 +1141,7 @@ test "setName, getName" {
     thread.join();
 }
 
-test "std.Thread" {
+test {
     // Doesn't use testing.refAllDecls() since that would pull in the compileError spinLoopHint.
     _ = Futex;
     _ = ResetEvent;

lib/std/atomic.zig

@@ -7,7 +7,7 @@ pub const Stack = @import("atomic/stack.zig").Stack;
 pub const Queue = @import("atomic/queue.zig").Queue;
 pub const Atomic = @import("atomic/Atomic.zig").Atomic;
 
-test "std.atomic" {
+test {
     _ = @import("atomic/stack.zig");
     _ = @import("atomic/queue.zig");
     _ = @import("atomic/Atomic.zig");

lib/std/crypto/pcurves/p256.zig

@@ -473,6 +473,6 @@ pub const AffineCoordinates = struct {
     }
 };
 
-test "p256" {
+test {
     _ = @import("tests/p256.zig");
 }

lib/std/crypto/pcurves/p384.zig

@@ -473,7 +473,7 @@ pub const AffineCoordinates = struct {
     }
 };
 
-test "p384" {
+test {
     if (@import("builtin").zig_backend == .stage2_c) return error.SkipZigTest;
 
     _ = @import("tests/p384.zig");

lib/std/crypto/pcurves/secp256k1.zig

@@ -551,7 +551,7 @@ pub const AffineCoordinates = struct {
     }
 };
 
-test "secp256k1" {
+test {
     if (@import("builtin").zig_backend == .stage2_c) return error.SkipZigTest;
 
     _ = @import("tests/secp256k1.zig");

lib/std/hash.zig

@@ -36,7 +36,7 @@ const xxhash = @import("hash/xxhash.zig");
 pub const XxHash64 = xxhash.XxHash64;
 pub const XxHash32 = xxhash.XxHash32;
 
-test "hash" {
+test {
     _ = adler;
     _ = auto_hash;
     _ = crc;

lib/std/math/complex.zig

@@ -189,7 +189,7 @@ test "complex.magnitude" {
     try testing.expect(math.approxEqAbs(f32, c, 5.83095, epsilon));
 }
 
-test "complex.cmath" {
+test {
     _ = @import("complex/abs.zig");
     _ = @import("complex/acosh.zig");
     _ = @import("complex/acos.zig");

lib/std/meta.zig

@@ -10,7 +10,7 @@ pub const TrailerFlags = @import("meta/trailer_flags.zig").TrailerFlags;
 
 const Type = std.builtin.Type;
 
-test "std.meta.TrailerFlags" {
+test {
     _ = TrailerFlags;
 }