[roll third_party/pigweed] pw_bloat: Fully specify data sources instead of appending

Instead of appending data sources in addition to memoryregions,
`pw bloat` and `pw_bloat.memory_regions_size_report` are updated
to accept the full list of data sources.

In addition, the default is changed from `memoryregions`, to
`memoryregions,sections` to match the default output from bloaty
for a diff report (albeit with memoryregions enabled).

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/126914

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 85133f27421412b..7cfb2d39aa98b41
Roller-URL: https://ci.chromium.org/b/8790955906313296033
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I5efa4fe173e9aaa756080055c3efea970b9f5304
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/126909
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 85133f2..7cfb2d3 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 85133f27421412b6b0d39becbc44828ea4a24415
+Subproject commit 7cfb2d39aa98b41e5ee24522df2f047da4690ea3