fix: Fix SignatureController hub cancelWithReason event handler

[OGPoyraz]

Description

This PR aims to fix cancelWithReason event handler which is causing rejectPendingApprovals to be hang and throw.

Related issues

Fixes: #29663

Manual testing steps

1. Create multiple signature request without accept or reject
2. Close notification window
3. See that no more badge number in extension bar

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[metamaskbot]

Builds ready [a0160fb]

• builds: chrome, firefox
• builds (flask): chrome, firefox
• builds (MMI): chrome
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • content-script: 0
  • offscreen: 0

Page Load Metrics (1788 ± 136 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	389	2957	1719	415	199
		domContentLoaded	1550	2886	1755	275	132
		load	1565	2961	1788	284	136
		domInteractive	25	109	41	24	11
		backgroundConnect	12	74	34	22	11
		firstReactRender	16	99	52	32	16
		getState	5	57	13	15	7
		initialActions	0	1	0	0	0
		loadScripts	1142	1956	1301	169	81
		setupStore	7	90	23	28	14
		uiStartup	1776	3202	2197	330	159

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 1 Bytes (0.00%)
• ui: 0 Bytes (0.00%)
• common: 0 Bytes (0.00%)