build: go 1.24

We were running behind and there were quite some deprecations to update.
This was mostly in the upstream copy/pasta package but seems quite
minimal.

vendor/gotest.tools/v3/internal/source/bazel.go

@@ -0,0 +1,51 @@
+package source
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// These Bazel env vars are documented here:
+// https://bazel.build/reference/test-encyclopedia
+
+// Signifies test executable is being driven by `bazel test`.
+//
+// Due to Bazel's compilation and sandboxing strategy,
+// some care is required to handle resolving the original *.go source file.
+var inBazelTest = os.Getenv("BAZEL_TEST") == "1"
+
+// The name of the target being tested (ex: //some_package:some_package_test)
+var bazelTestTarget = os.Getenv("TEST_TARGET")
+
+// Absolute path to the base of the runfiles tree
+var bazelTestSrcdir = os.Getenv("TEST_SRCDIR")
+
+// The local repository's workspace name (ex: __main__)
+var bazelTestWorkspace = os.Getenv("TEST_WORKSPACE")
+
+func bazelSourcePath(filename string) (string, error) {
+	// Use the env vars to resolve the test source files,
+	// which must be provided as test data in the respective go_test target.
+	filename = filepath.Join(bazelTestSrcdir, bazelTestWorkspace, filename)
+
+	_, err := os.Stat(filename)
+	if os.IsNotExist(err) {
+		return "", fmt.Errorf(bazelMissingSourceMsg, filename, bazelTestTarget)
+	}
+	return filename, nil
+}
+
+var bazelMissingSourceMsg = `
+the test source file does not exist: %s
+It appears that you are running this test under Bazel (target: %s).
+Check that your test source files are added as test data in your go_test targets.
+
+Example:
+    go_test(
+        name = "your_package_test",
+        srcs = ["your_test.go"],
+        deps = ["@tools_gotest_v3//assert"],
+        data = glob(["*_test.go"])
+    )"
+`