pw_unit_test: Make framework memory pool size configurable

Tested: Configured value on sh build, size of bundle changed.
Change-Id: Iac834fbf8bef078fd9b2ddd6207831c5d467519b
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/45440
Commit-Queue: Max Koopman <koopman@google.com>
Reviewed-by: Wyatt Hepler <hepler@google.com>
diff --git a/pw_unit_test/BUILD b/pw_unit_test/BUILD
index 99c9eec..312efde 100644
--- a/pw_unit_test/BUILD
+++ b/pw_unit_test/BUILD
@@ -23,6 +23,12 @@
 licenses(["notice"])  # Apache License 2.0
 
 pw_cc_library(
+    name = "config",
+    hdrs = ["public/pw_unit_test/config.h"],
+    includes = ["public"],
+)
+
+pw_cc_library(
     name = "pw_unit_test",
     srcs = [
         "framework.cc",
@@ -37,6 +43,7 @@
         "public_overrides",
     ],
     deps = [
+        ":config",
         "//pw_polyfill",
         "//pw_preprocessor",
         "//pw_string",