Revert "Release 912.0.0 (#8451)" (#8456)

This reverts commit e00fdbf. The root
`package.json` was never bumped, so deployment was not initiated.

## Explanation

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## References

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## Checklist

- [ ] I've updated the test suite for new or updated code as appropriate
- [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or
updated code as appropriate
- [ ] I've communicated my changes to consumers by [updating changelogs
for packages I've
changed](https://github.com/MetaMask/core/tree/main/docs/processes/updating-changelogs.md)
- [ ] I've introduced [breaking
changes](https://github.com/MetaMask/core/tree/main/docs/processes/breaking-changes.md)
in this PR and have prepared draft pull requests for clients and
consumer packages to resolve them

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Dependency-only revert that downgrades `@metamask/base-controller`
from `9.1.0` to `9.0.1` across many packages; risk is limited to
potential build/behavior differences for any consumers expecting `9.1.0`
APIs.
> 
> **Overview**
> Reverts the prior `@metamask/base-controller@9.1.0` release by
resetting `@metamask/base-controller` back to `9.0.1` and updating all
affected packages to depend on `^9.0.1` again.
> 
> Corresponding changelog entries referencing the `9.1.0` bump are
removed/rolled back, and `yarn.lock` is updated to reflect the
downgraded dependency graph.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
0910e51. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: mcmire

packages/account-tree-controller/CHANGELOG.md

@@ -54,7 +54,7 @@
   },
   "dependencies": {
     "@metamask/accounts-controller": "^37.2.0",
-    "@metamask/base-controller": "^9.1.0",
+    "@metamask/base-controller": "^9.0.1",
     "@metamask/keyring-api": "^21.6.0",
     "@metamask/keyring-controller": "^25.2.0",
     "@metamask/messenger": "^1.1.1",

packages/account-tree-controller/package.json

@@ -54,7 +54,7 @@
   },
   "dependencies": {
     "@ethereumjs/util": "^9.1.0",
-    "@metamask/base-controller": "^9.1.0",
+    "@metamask/base-controller": "^9.0.1",
     "@metamask/eth-snap-keyring": "^19.0.0",
     "@metamask/keyring-api": "^21.6.0",
     "@metamask/keyring-controller": "^25.2.0",

packages/accounts-controller/CHANGELOG.md

@@ -53,7 +53,7 @@
     "test:watch": "NODE_OPTIONS=--experimental-vm-modules jest --watch"
   },
   "dependencies": {
-    "@metamask/base-controller": "^9.1.0",
+    "@metamask/base-controller": "^9.0.1",
     "@metamask/controller-utils": "^11.20.0",
     "@metamask/messenger": "^1.1.1",
     "@metamask/utils": "^11.9.0"

packages/accounts-controller/package.json

@@ -53,7 +53,7 @@
     "test:watch": "NODE_OPTIONS=--experimental-vm-modules jest --watch"
   },
   "dependencies": {
-    "@metamask/base-controller": "^9.1.0",
+    "@metamask/base-controller": "^9.0.1",
     "@metamask/messenger": "^1.1.1",
     "@metamask/superstruct": "^3.1.0",
     "@metamask/utils": "^11.9.0"

packages/address-book-controller/CHANGELOG.md

@@ -53,7 +53,7 @@
     "test:watch": "NODE_OPTIONS=--experimental-vm-modules jest --watch"
   },
   "dependencies": {
-    "@metamask/base-controller": "^9.1.0",
+    "@metamask/base-controller": "^9.0.1",
     "@metamask/messenger": "^1.1.1",
     "@metamask/utils": "^11.9.0"
   },