feat: add build rules for 3 separate versions of ICU

Author: filmil

WORKSPACE

@@ -12,7 +12,7 @@ http_archive(
     patches = [
         # ICU has a nascent bazel build, which messes up our build based on
         # the configure_make rule from rules_foreign_cc. So we remove them.
-        "//third_party/icu_74:remove-build-files.patch",
+        "//third_party/icu_74:0001-fix-removes-BUILD-files.patch",
     ],
     patch_args = [
         "-p1",
@@ -21,3 +21,39 @@ http_archive(
         "--remove-empty-files",
     ]
 )
+
+http_archive(
+    name = "icu_73",
+    strip_prefix = "icu-release-73-1",
+    integrity = "sha256-57a1QMiB6D0kC0oSty+8l+9frTDY0A8u9nS6GOO/NkA=",
+    build_file = "//third_party/icu_73:icu.BUILD.bazel",
+    urls = [
+        "https://github.com/unicode-org/icu/archive/refs/tags/release-73-1.tar.gz",
+        "https://github.com/unicode-org/icu/archive/refs/tags/release-73-1.zip",
+    ],
+    patches = [
+        "//third_party/icu_73:0001-fix-removes-BUILD-files.patch",
+    ],
+    patch_args = [
+        "-p1",
+        "--remove-empty-files",
+    ]
+)
+
+http_archive(
+    name = "icu_72",
+    strip_prefix = "icu-release-72-1",
+    integrity = "sha256-Q8utYo2Y83o/lfbDRXn5FE70veYCSPpgBKTwBtdIfmk=",
+    build_file = "//third_party/icu_72:icu.BUILD.bazel",
+    urls = [
+        "https://github.com/unicode-org/icu/archive/refs/tags/release-72-1.tar.gz",
+        "https://github.com/unicode-org/icu/archive/refs/tags/release-72-1.zip",
+    ],
+    patches = [
+        "//third_party/icu_72:0001-fix-removes-BUILD-files.patch",
+    ],
+    patch_args = [
+        "-p1",
+        "--remove-empty-files",
+    ]
+)

third_party/README.md

@@ -0,0 +1,5 @@
+
+# ICU patches
+
+All ICU versions have been edited to remove existing bazel's BUILD files.
+This is because BUILD files will affect how `rules_foreign_cc` builds.